diff --git a/components/studio2/Bench.vue b/components/studio2/Bench.vue
index c52d428..1473bc6 100644
--- a/components/studio2/Bench.vue
+++ b/components/studio2/Bench.vue
@@ -4,7 +4,7 @@
    <div><h1 class="font-display text-3xl font-bold">Studio 2</h1><p class="text-sm text-zinc-400">One hero. Every shot.</p></div>
    <div class="flex flex-wrap items-center gap-3">
     <label class="text-sm">Folder <select v-model="form.folderId" class="rounded-lg bg-zinc-800 p-2"><option v-for="f in library.folders" :value="f.id" :key="f.id">{{ f.name }}</option></select></label>
-    <label class="text-sm">Hero identity <select v-model="form.identityStillId" class="max-w-52 rounded-lg bg-zinc-800 p-2"><option value="">Choose hero</option><option v-for="s in stills" :key="s.id" :value="s.id">{{ s.name || s.filename }}</option></select></label>
+    <label class="text-sm">Hero identity <select v-model="form.identityStillId" class="max-w-52 rounded-lg bg-zinc-800 p-2"><option value="">Choose hero</option><option v-for="s in stills" :key="s.id" :value="s.id">{{ assetLabel(s) }}</option></select></label>
     <label class="text-sm"><input v-model="form.lockFace" type="checkbox"> Lock face <span class="block text-xs text-zinc-500">Face, hair, glasses, body</span></label><label class="text-sm"><input v-model="form.lockOutfit" type="checkbox"> Lock outfit <span class="block text-xs text-zinc-500">Wardrobe from hero</span></label><span v-if="form.identityStillId && form.hideInput" class="text-xs text-zinc-400">Still loaded · preview hidden</span>
     <img v-if="form.identityStillId && !form.hideInput" :src="stillUrl(form.identityStillId)" class="h-12 w-12 rounded-lg object-cover" alt="Sticky hero identity">
     <NuxtLink to="/library" class="text-sm text-amber-200">Library</NuxtLink><NuxtLink to="/" class="text-sm text-zinc-400">Studio 1</NuxtLink>
@@ -15,23 +15,22 @@
   <div class="grid gap-6 lg:grid-cols-[1.3fr_1fr]">
    <section class="space-y-4">
     <div class="flex min-h-80 items-center justify-center overflow-hidden rounded-3xl border border-white/10 bg-black">
-     <video v-if="selected?.kind==='clip'" :src="`/api/library/clips/${selected.id}/video`" controls class="max-h-[65vh] w-full" />
+     <video v-if="selected?.kind==='clip'" :src="`/api/library/clips/${selected.id}/video`" controls class="max-h-[65vh] w-full object-contain" />
      <img v-else-if="selected" :src="stillUrl(selected.id)" class="max-h-[65vh] object-contain" alt="Current output">
-     <p v-else-if="form.imageAId && form.hideInput" class="text-zinc-400">Still loaded · preview hidden</p>
-     <img v-else-if="form.imageAId" :src="stillUrl(form.imageAId)" class="max-h-[65vh] object-contain" alt="Source composition">
-     <p v-else class="text-zinc-500">Your next scene starts here</p>
+     <p v-else class="text-zinc-500">Select a result to view it here</p>
     </div>
     <div v-if="selected" class="flex gap-3"><button class="rounded-full border border-white/20 px-4 py-2 text-sm" @click="restore(selected)">Use as input</button><button class="rounded-full border border-white/20 px-4 py-2 text-sm" @click="detailsOpen=true">Details</button><VideoUpscaleControl v-if="selected.kind==='clip'" :clip-id="selected.id" /></div>
     <div class="flex gap-2 overflow-x-auto" aria-label="Current family outputs"><button v-for="o in family" :key="o.id" @click="selectOutput(o)" class="shrink-0 rounded-lg border p-1" :class="selected?.id===o.id?'border-amber-300':'border-white/10'"><img :src="o.kind==='clip'?`/api/library/clips/${o.id}/thumb`:stillUrl(o.id)" class="h-20 w-24 rounded object-cover" alt="Family output"></button></div>
+    <section class="rounded-2xl border border-white/10 bg-black p-3" aria-label="Input preview"><h2 class="mb-2 text-sm text-zinc-400">Input preview · {{ inputStill ? assetLabel(inputStill) : form.startClipId ? 'Previous clip · last frame' : 'No start still' }}</h2><p v-if="form.hideInput && (inputStill || form.startClipId)" class="p-6 text-zinc-400">Still loaded · preview hidden</p><img v-else-if="inputStill" :src="stillUrl(inputStill.id)" class="max-h-56 w-full object-contain" alt="Selected source still"><p v-else-if="form.startClipId" class="p-6 text-zinc-400">Previous clip loaded · its last frame will be used</p><p v-else class="p-6 text-zinc-500">Choose a source / start still</p></section>
     <div class="grid gap-3 sm:grid-cols-2">
-     <label>Source / start still<select v-model="form.imageAId" class="mt-1 w-full rounded-xl bg-zinc-800 p-2"><option value="">None</option><option v-for="s in stills" :key="s.id" :value="s.id">{{ s.name || s.filename }}</option></select></label>
-     <label v-if="form.mode==='compose'">Second still<select v-model="form.imageBId" class="mt-1 w-full rounded-xl bg-zinc-800 p-2"><option value="">Required</option><option v-for="s in stills" :key="s.id" :value="s.id">{{ s.name || s.filename }}</option></select></label>
-     <label v-if="form.mode==='refine'">Mask<select v-model="form.maskId" class="mt-1 w-full rounded-xl bg-zinc-800 p-2"><option value="">Required: white area to refine</option><option v-for="s in stills" :key="s.id" :value="s.id">{{ s.name || s.filename }}</option></select></label>
+     <label>Source / start still<select v-model="form.imageAId" @change="sourceChanged" class="mt-1 w-full rounded-xl bg-zinc-800 p-2"><option value="">None</option><option v-for="s in stills" :key="s.id" :value="s.id">{{ assetLabel(s) }}</option></select></label>
+     <label v-if="form.mode==='compose'">Second still<select v-model="form.imageBId" class="mt-1 w-full rounded-xl bg-zinc-800 p-2"><option value="">Required</option><option v-for="s in stills" :key="s.id" :value="s.id">{{ assetLabel(s) }}</option></select></label>
+     <label v-if="form.mode==='refine'">Mask<select v-model="form.maskId" class="mt-1 w-full rounded-xl bg-zinc-800 p-2"><option value="">Required: white area to refine</option><option v-for="s in stills" :key="s.id" :value="s.id">{{ assetLabel(s) }}</option></select></label>
      <label v-if="form.mode==='extend'">Previous clip<select :value="form.startClipId" @change="chooseClip(($event.target as HTMLSelectElement).value)" class="mt-1 w-full rounded-xl bg-zinc-800 p-2"><option value="">Choose a clip</option><option v-for="c in clips" :key="c.id" :value="c.id">{{ c.name || c.prompt?.slice(0,50) }}</option></select></label>
-     <label v-if="video">Optional end still<select v-model="form.endStillId" class="mt-1 w-full rounded-xl bg-zinc-800 p-2"><option value="">None</option><option v-for="s in stills" :key="s.id" :value="s.id">{{ s.name || s.filename }}</option></select></label>
+     <label v-if="video">Optional end still<select v-model="form.endStillId" class="mt-1 w-full rounded-xl bg-zinc-800 p-2"><option value="">None</option><option v-for="s in stills" :key="s.id" :value="s.id">{{ assetLabel(s) }}</option></select></label>
      <label class="text-sm">Add still to folder<input type="file" accept="image/*" class="mt-2 block text-xs" @change="upload"></label>
     </div>
-    <details v-if="video" class="rounded-xl border border-white/10 p-3"><summary>Add Guide stills</summary><div v-for="(g,i) in form.guides" :key="i" class="mt-2 flex gap-2"><select v-model="g.stillId" class="min-w-0 flex-1 bg-zinc-800 p-2"><option value="">Choose guide</option><option v-for="s in stills" :key="s.id" :value="s.id">{{ s.name || s.filename }}</option></select><input v-model.number="g.frame" type="number" min="1" aria-label="Guide frame" class="w-20 bg-zinc-800 p-2"><button @click="form.guides.splice(i,1)">Remove</button></div><button class="mt-3 text-amber-200" @click="form.guides.push({stillId:'',frame:24})">Add guide</button></details>
+    <details v-if="video" class="rounded-xl border border-white/10 p-3"><summary>Add Guide stills</summary><div v-for="(g,i) in form.guides" :key="i" class="mt-2 flex gap-2"><select v-model="g.stillId" class="min-w-0 flex-1 bg-zinc-800 p-2"><option value="">Choose guide</option><option v-for="s in stills" :key="s.id" :value="s.id">{{ assetLabel(s) }}</option></select><input v-model.number="g.frame" type="number" min="1" aria-label="Guide frame" class="w-20 bg-zinc-800 p-2"><button @click="form.guides.splice(i,1)">Remove</button></div><button class="mt-3 text-amber-200" @click="form.guides.push({stillId:'',frame:24})">Add guide</button></details>
    </section>
    <section class="space-y-4">
     <div class="flex justify-between"><h2 class="text-xl font-semibold">Prompt</h2><button class="text-sm text-amber-200" @click="advanced=!advanced">{{ advanced?'Simple':'Advanced' }}</button></div>
@@ -48,7 +47,7 @@
   </div>
   <div v-if="settingsOpen || detailsOpen" class="fixed inset-0 z-50 bg-black/70" @click.self="settingsOpen=false;detailsOpen=false">
    <aside class="absolute inset-y-0 right-0 w-full max-w-md overflow-auto border-l border-white/15 bg-zinc-950 p-6"><button class="float-right" @click="settingsOpen=false;detailsOpen=false">Close</button>
-    <template v-if="settingsOpen"><h2 class="mb-6 text-xl font-semibold">Generation settings</h2><label class="mb-4 block">Engine<select v-model="form.engine" class="mt-1 w-full rounded bg-zinc-800 p-2"><template v-if="video"><option value="minimax">MiniMax H3</option></template><template v-else><option value="flux">Flux Klein 9B Base</option><option value="krea" :disabled="['edit','compose','iterate'].includes(form.mode)">Krea 2 (Generate / Refine)</option></template></select></label><AspectRatioPick v-model="form.settings.aspect" heading="Aspect" :options="aspectOptions" /><p class="my-3 text-sm text-zinc-400">{{ resolvedSize.width }} × {{ resolvedSize.height }} · fit with padding, never stretch</p><label v-for="key in ['steps','cfg','seed',...(video?['duration','fps']:[])]" :key="key" class="mb-4 block capitalize">{{ key }}<input v-model.number="form.settings[key]" type="number" class="mt-1 w-full rounded bg-zinc-800 p-2"></label><label v-if="video"><input v-model="form.settings.turbo" type="checkbox"> Turbo</label><LoraSelect v-model="form.settings.loraStack" class="mt-5" :names="video?loraNames.video:loraNames.image" :engine="video?'':form.engine" :clip-strength="true" @insert-trigger="form.promptSections.action += ' '+$event" /><button class="mt-2 text-sm text-amber-200" @click="loadLoras">Refresh LoRAs</button></template>
+    <template v-if="settingsOpen"><h2 class="mb-6 text-xl font-semibold">Generation settings</h2><label class="mb-4 block">Engine<select v-model="form.engine" class="mt-1 w-full rounded bg-zinc-800 p-2"><template v-if="video"><option value="minimax">MiniMax H3</option></template><template v-else><option value="flux">Flux Klein 9B Base</option><option value="krea" :disabled="['edit','compose','iterate'].includes(form.mode)">Krea 2 (Generate / Refine)</option></template></select></label><AspectRatioPick v-model="form.settings.aspect" heading="Aspect" :options="aspectOptions" /><p class="my-3 text-sm text-zinc-400">{{ resolvedSize.width }} × {{ resolvedSize.height }} · fit with padding, never stretch</p><label v-for="key in ['steps','cfg',...(video?['duration','fps']:[])]" :key="key" class="mb-4 block capitalize">{{ key }}<input v-model.number="form.settings[key]" type="number" class="mt-1 w-full rounded bg-zinc-800 p-2"></label><label class="mb-4 block">Seed · {{ form.settings.seedMode==='locked'?'Locked':'Random each job' }}<input :value="form.settings.seed" type="number" min="0" max="2147483647" class="mt-1 w-full rounded bg-zinc-800 p-2" @input="form.settings.seed=Number(($event.target as HTMLInputElement).value);form.settings.seedMode='locked'"></label><button class="mb-4 text-sm text-amber-200" @click="form.settings.seedMode='random';form.settings.seed=randomSeed()">Random</button><label v-if="video"><input v-model="form.settings.turbo" type="checkbox"> Turbo</label><LoraSelect v-model="form.settings.loraStack" class="mt-5" :names="video?loraNames.video:loraNames.image" :engine="video?'':form.engine" :clip-strength="true" @insert-trigger="form.promptSections.action += ' '+$event" /><button class="mt-2 text-sm text-amber-200" @click="loadLoras">Refresh LoRAs</button></template>
     <template v-else><h2 class="mb-6 text-xl font-semibold">Output details</h2><Studio2Details :metadata="selected?.studio2" /></template>
    </aside>
   </div>
@@ -57,42 +56,47 @@
 <script setup lang="ts">
 import {compilePrompt,sectionsFrom} from '~/shared/studio2/contracts.mjs'
 import {aspectOptions,resolveSize,bindClip,restoreAsset,extendSelected} from '~/shared/studio2/input.mjs'
+import {folderAssets,newestOutput,assetLabel} from '~/shared/studio2/viewer.mjs'
+import {randomSeed} from '~/shared/studio2/seed.mjs'
+const measured=reactive<Record<string,{width:number;height:number}>>({}),seenOutputs=new Set<string>()
 const loraNames=ref<any>({image:[],video:[]}),now=ref(Date.now()),gpuLabel=ref('Checking…')
-const library=ref<any>({folders:[],stills:[],clips:[]}),jobs=ref<any[]>([]),selected=ref<any>(null),family=ref<any[]>([])
-const form=reactive<any>({mode:'generate',engine:'flux',lockFace:true,lockOutfit:true,hideInput:false,folderId:'',identityStillId:'',imageAId:'',imageBId:'',maskId:'',startClipId:'',endStillId:'',guides:[],promptSections:sectionsFrom({}),settings:{aspect:'auto',fps:24,width:1344,height:768,steps:24,cfg:4,seed:1,duration:5,turbo:true,loraStack:[]}})
+const library=ref<any>({folders:[],stills:[],clips:[]}),jobs=ref<any[]>([]),selected=ref<any>(null)
+const form=reactive<any>({mode:'generate',engine:'flux',lockFace:true,lockOutfit:true,hideInput:false,folderId:'',identityStillId:'',imageAId:'',imageBId:'',maskId:'',startClipId:'',endStillId:'',guides:[],promptSections:sectionsFrom({}),settings:{aspect:'auto',fps:24,steps:24,cfg:4,seed:null,seedMode:'random',duration:5,turbo:true,loraStack:[]}})
 const route=useRoute()
 const tasks=['generate','edit','compose','refine','iterate','video','extend'],advanced=ref(false),settingsOpen=ref(false),detailsOpen=ref(false),submitting=ref(false),error=ref(''),batchText=ref('')
 const video=computed(()=>['video','extend'].includes(form.mode)),stills=computed(()=>library.value.stills.filter((s:any)=>s.folderId===form.folderId)),clips=computed(()=>library.value.clips.filter((s:any)=>s.folderId===form.folderId)),compiled=computed(()=>compilePrompt(form.promptSections,video.value,form))
 const stillUrl=(id:string)=>`/api/library/stills/${id}`
 const folderJobs=computed(()=>jobs.value.filter(j=>j.request.folderId===form.folderId))
 const activeJob=computed(()=>folderJobs.value.find(j=>!['complete','failed','cancelled'].includes(j.state)))
-const sourceSize=computed(()=>form.startClipId?clips.value.find((c:any)=>c.id===form.startClipId):stills.value.find((s:any)=>s.id===(form.imageAId||form.identityStillId)))
-const resolvedSize=computed(()=>resolveSize(form.settings.aspect,sourceSize.value,form.settings))
+const inputStill=computed(()=>stills.value.find((s:any)=>s.id===form.imageAId))
+const family=computed(()=>folderAssets(library.value,jobs.value,form.folderId))
+const sourceAsset=computed(()=>form.startClipId?clips.value.find((c:any)=>c.id===form.startClipId):stills.value.find((s:any)=>s.id===(form.imageAId||form.identityStillId)))
+const sourceSize=computed(()=>measured[sourceAsset.value?.id] || sourceAsset.value)
+const resolvedSize=computed(()=>resolveSize(form.settings.aspect,sourceSize.value))
+watch(()=>sourceAsset.value?.id,id=>{const asset=sourceAsset.value;if(!import.meta.client||!asset||measured[id])return;const media=asset.id===form.startClipId?document.createElement('video'):new Image();if(media.tagName==='VIDEO')(media as HTMLVideoElement).preload='metadata';const done=()=>{measured[asset.id]={width:(media as HTMLVideoElement).videoWidth||(media as HTMLImageElement).naturalWidth,height:(media as HTMLVideoElement).videoHeight||(media as HTMLImageElement).naturalHeight}};media.addEventListener(media.tagName==='VIDEO'?'loadedmetadata':'load',done,{once:true});media.src=media.tagName==='VIDEO'?`/api/library/clips/${asset.id}/video`:stillUrl(asset.id)})
 function chooseTask(task:string){if(task==='extend'){Object.assign(form,extendSelected(form,selected.value?.kind==='clip'?selected.value:null));return}const was=video.value;form.mode=task;form.startClipId='';if(video.value!==was){form.engine=video.value?'minimax':'flux';form.settings.steps=video.value?8:24;form.settings.cfg=video.value?1.5:4}}
 function chooseClip(id:string){if(!id){form.startClipId='';return}const clip=clips.value.find((c:any)=>c.id===id);if(clip)Object.assign(form,bindClip(form,clip))}
-function selectOutput(item:any){selected.value=item;if(item?.kind==='clip' && form.startClipId!==item.id){Object.assign(form,bindClip(form,item));form.mode='extend'}}
+function selectOutput(item:any){selected.value=item}
+function sourceChanged(){form.startClipId='';if(form.mode==='extend')form.mode='video';form.settings.aspect='auto'}
 function restore(item:any){Object.assign(form,restoreAsset(form,item));form.guides=form.guides||[];batchText.value=''}
-function focusJob(job:any){family.value=job.outputs||[];selectOutput(family.value.at(-1)||null)}
+function focusJob(job:any){selectOutput(job.outputs?.at(-1)||null)}
 async function loadLoras(){loraNames.value=await $fetch('/api/loras').catch(()=>({image:[],video:[]}))}
-async function queue(){submitting.value=true;error.value='';try{await $fetch('/api/studio-2/jobs',{method:'POST',body:{...form,settings:{...form.settings,...resolvedSize.value},batch:batchText.value.split('\n').map(s=>s.trim()).filter(Boolean)}});await refresh()}catch(e:any){error.value=e.data?.statusMessage||e.message}finally{submitting.value=false}}
+async function queue(){submitting.value=true;error.value='';try{if(form.settings.seedMode!=='locked')form.settings.seed=randomSeed();const queued=await $fetch<any>('/api/studio-2/jobs',{method:'POST',body:{...form,settings:{...form.settings,...resolvedSize.value},batch:batchText.value.split('\n').map(s=>s.trim()).filter(Boolean)}});form.settings.seed=queued.seed;form.settings.width=queued.width;form.settings.height=queued.height;await refresh()}catch(e:any){error.value=e.data?.statusMessage||e.message}finally{submitting.value=false}}
 async function cancel(job:any){await $fetch('/api/studio-2/cancel',{method:'POST',body:{id:job.id}});await refresh()}
 async function upload(event:Event){const file=(event.target as HTMLInputElement).files?.[0];if(!file)return;const body=new FormData();body.append('image',file);body.append('folderId',form.folderId);try{library.value=await $fetch('/api/library/stills',{method:'POST',body})}catch(e:any){error.value=e.data?.statusMessage||e.message}}
 async function refresh(){
- jobs.value=await $fetch<any[]>('/api/studio-2/jobs')
- const latest=jobs.value.find(j=>j.request.folderId===form.folderId&&j.outputs?.length)
- if(latest&&!selected.value){library.value=await $fetch('/api/library?light=1');focusJob(latest);return}
- const current=jobs.value.find(j=>j.outputs?.some((o:any)=>family.value.some(f=>f.id===o.id)))
- if(current&&current.outputs.some((o:any)=>!family.value.some(f=>f.id===o.id))){
-  const following=selected.value?.id===family.value.at(-1)?.id
-  family.value=current.outputs
-  if(following)selectOutput(family.value.at(-1))
-  library.value=await $fetch('/api/library?light=1')
- }
+ const [nextJobs,nextLibrary]=await Promise.all([$fetch<any[]>('/api/studio-2/jobs'),$fetch<any>('/api/library?light=1')])
+ jobs.value=nextJobs;library.value=nextLibrary
+ const fresh=newestOutput(nextJobs,seenOutputs,form.folderId)
+ for(const job of nextJobs)for(const output of job.outputs||[])seenOutputs.add(output.id)
+ if(fresh)selectOutput(family.value.find(a=>a.id===fresh.id)||fresh)
+ else if(!selected.value && family.value.length)selectOutput(family.value.at(-1))
 }
-watch(()=>form.folderId,id=>{if(import.meta.client)form.identityStillId=localStorage.getItem(`studio2-hero:${id}`)||''},{flush:'sync'})
+
+watch(()=>form.folderId,id=>{selected.value=null;form.imageAId='';form.startClipId='';if(import.meta.client)form.identityStillId=localStorage.getItem(`studio2-hero:${id}`)||''},{flush:'sync'})
 watch(()=>form.identityStillId,id=>{if(import.meta.client&&form.folderId)localStorage.setItem(`studio2-hero:${form.folderId}`,id)})
 watch(()=>form.hideInput,value=>{if(import.meta.client)localStorage.setItem('studio2-hide-input',String(value))})
 let timer:ReturnType<typeof setTimeout>,clock:ReturnType<typeof setInterval>,disposed=false
-onMounted(async()=>{form.hideInput=localStorage.getItem('studio2-hide-input')==='true';clock=setInterval(()=>{now.value=Date.now()},1000);void loadLoras();library.value=await $fetch('/api/library?light=1');form.folderId=library.value.folders[0]?.id||'';const id=String(route.query.still||route.query.clip||'');const asset=[...library.value.stills,...library.value.clips].find((a:any)=>a.id===id);if(asset){selected.value={...asset,kind:route.query.clip?'clip':'still'};family.value=[selected.value];if(route.query.use==='1')restore(selected.value)};const poll=async()=>{try{await refresh();const health=await $fetch<any>('/api/health');gpuLabel.value=health.comfy?.busy?'Busy':health.comfy?.ok?'Ready':'Sleeping / unavailable'}catch(e:any){error.value=e.data?.statusMessage||e.message}if(!disposed)timer=setTimeout(poll,3000)};void poll()})
+onMounted(async()=>{form.settings.seed=randomSeed();form.hideInput=localStorage.getItem('studio2-hide-input')==='true';clock=setInterval(()=>{now.value=Date.now()},1000);void loadLoras();library.value=await $fetch('/api/library?light=1');form.folderId=library.value.folders[0]?.id||'';const id=String(route.query.still||route.query.clip||'');const asset=[...library.value.stills,...library.value.clips].find((a:any)=>a.id===id);if(asset){selected.value={...asset,kind:route.query.clip?'clip':'still'};if(route.query.use==='1')restore(selected.value)};const poll=async()=>{try{await refresh();const health=await $fetch<any>('/api/health');gpuLabel.value=health.comfy?.busy?'Busy':health.comfy?.ok?'Ready':'Sleeping / unavailable'}catch(e:any){error.value=e.data?.statusMessage||e.message}if(!disposed)timer=setTimeout(poll,3000)};void poll()})
 onBeforeUnmount(()=>{disposed=true;clearTimeout(timer);clearInterval(clock)})
 </script>
diff --git a/server/api/studio-2/jobs.post.ts b/server/api/studio-2/jobs.post.ts
index ebf5eec..666add0 100644
--- a/server/api/studio-2/jobs.post.ts
+++ b/server/api/studio-2/jobs.post.ts
@@ -1,4 +1,5 @@
 import { validateRequest } from '~/shared/studio2/contracts.mjs';
+import { resolveRequestSize } from '../../utils/studio2/size';
 import { parsePostedLoraStack, assertImageV2LoraStack } from '../../utils/loras';
 import { saveRecord, readRecord } from '../../utils/studio2/store';
 import { addStudioJob, kickStudioQueue, type StudioJobPayload } from '../../utils/studioQueue';
@@ -22,10 +23,11 @@ export default defineEventHandler(async (event) => {
         assertFolderAccess(event, getStill(owner, id).folderId);
     if (request.startClipId)
         assertFolderAccess(event, getClip(owner, request.startClipId).folderId);
+    await resolveRequestSize(owner,request);
     const id = crypto.randomUUID(), record = { id, owner, request, state: 'waiting', queuedAt: Date.now(), familyId: crypto.randomUUID(), outputs: [], purgeResult: 'Not yet saved' };
     saveRecord(record);
     const row = await addStudioJob({ ownerKey: owner, kind: ['video', 'extend'].includes(request.mode) ? 'video' : 'edit', familyId: record.familyId, payload: { ...request.settings, studio2Id: id, prompt: request.compiledPrompt, folderId: request.folderId, extensions: [], referenceStillIds: [], useIdentityRefs: false, queueAutoRun: true } as StudioJobPayload });
     saveRecord({ ...readRecord(owner, id), queueId: row.id });
     kickStudioQueue();
-    return { id };
+    return { id, seed:request.settings.seed, width:request.settings.width, height:request.settings.height };
 });
diff --git a/server/utils/studio2/runner.ts b/server/utils/studio2/runner.ts
index 0a12d3c..aae292e 100644
--- a/server/utils/studio2/runner.ts
+++ b/server/utils/studio2/runner.ts
@@ -1,10 +1,11 @@
 import { watchProgress } from './progress';
 import { fitStill } from './media';
-import { resolveSize } from '~/shared/studio2/input.mjs';
+import { resolveRequestSize } from './size';
+import { queueSeeds } from '~/shared/studio2/seed.mjs';
 import { readFileSync, mkdirSync, existsSync, unlinkSync } from 'node:fs';
 import { join } from 'node:path';
 import template from '../../assets/studio2_minimax_native.json';
-import { nativeVideoGraph, attachHeroReference } from '~/shared/studio2/graphs.mjs';
+import { nativeVideoGraph, attachHeroReference, applyResolvedImageSize } from '~/shared/studio2/graphs.mjs';
 import { compilePrompt, scopedFile } from '~/shared/studio2/contracts.mjs';
 import { createJob, restoreJob, getJob, emitJob, type Job } from '../jobs';
 import { markStudioLive, onLiveVideoSettled, type StudioJob } from '../studioQueue';
@@ -65,8 +66,7 @@ async function purge(r: any) {
 async function prepareGraph(r: any) {
     const q = r.request, s = q.settings, prefix = String(useRuntimeConfig().comfyFilenamePrefix).replace(/\/$/, '') + `/studio2/${r.id}/${r.index}`;
     const load = async (id: string, label: string) => id ? upload(r, label, readFileSync(stillPath(r.owner, getStill(r.owner, id).id))) : '';
-    const source = q.startClipId ? getClip(r.owner,q.startClipId) : (q.imageAId || q.identityStillId) ? getStill(r.owner,q.imageAId || q.identityStillId) : null;
-    Object.assign(s,resolveSize(s.aspect,source,s));
+    await resolveRequestSize(r.owner,q);
     saveRecord(r);
     const hero = q.lockFace === false && q.lockOutfit === false ? '' : await load(q.identityStillId, 'hero'), a = await load(q.imageAId, 'source'), b = await load(q.imageBId, 'compose'), mask = await load(q.maskId, 'mask');
     let graph: any;
@@ -96,6 +96,7 @@ async function prepareGraph(r: any) {
         const found = q.engine === 'krea' ? await resolveKreaGenerateAssets() : null;
         const assets = found ? { kreaUnetName: found.unet, kreaClipName: found.clip, kreaVaeName: found.vae, kreaConceptLora: found.conceptLora } : {};
         graph = buildImageV2Workflow({ ...s, ...assets, engine: q.engine, mode, task: 'scene', prompt: q.compiledPrompt, imageAName: a, imageBName: mode === 'compose' ? b : undefined, maskName: mode === 'refine' ? mask : undefined, filenamePrefix: prefix + '/image' }).graph;
+        applyResolvedImageSize(graph,s);
         if (q.engine === 'flux')
             attachHeroReference(graph, hero);
         else if (hero && ['edit', 'compose', 'iterate'].includes(q.mode))
@@ -112,6 +113,7 @@ async function run(r: any, job: Job) {
     try {
         const prompts = r.prompts || [r.request.promptSections, ...r.request.batch];
         r.prompts = prompts;
+        r.request.shotSeeds ||= queueSeeds(r.request.settings,prompts.length);
         saveRecord(r);
         for (r.index = r.index || 0; r.index < prompts.length; r.index++) {
             if (job.status === 'cancelled')
@@ -122,6 +124,7 @@ async function run(r: any, job: Job) {
                         throw new Error('Cancelled');
                     await new Promise(resolve => setTimeout(resolve, 2000));
                 }
+                r.request.settings.seed = r.request.shotSeeds[r.index];
                 r.files = [];
                 r.progress = null;
                 r.request.promptSections = prompts[r.index];
diff --git a/server/utils/studio2/size.ts b/server/utils/studio2/size.ts
new file mode 100644
index 0000000..0c8a860
--- /dev/null
+++ b/server/utils/studio2/size.ts
@@ -0,0 +1,25 @@
+import { readFileSync } from 'node:fs'
+import { execFile } from 'node:child_process'
+import { promisify } from 'node:util'
+import { getClip, getStill, clipVideoPath, stillPath } from '../library'
+import { imageDimensions } from '../resolution'
+import { resolveSize } from '~/shared/studio2/input.mjs'
+const exec = promisify(execFile)
+export async function resolveRequestSize(owner: string, request: any) {
+  const video=['video','extend'].includes(request.mode)
+  let dimensions:any
+  if (video && request.startClipId) {
+    getClip(owner,request.startClipId)
+    const result=await exec('ffprobe',['-v','error','-select_streams','v:0','-show_entries','stream=width,height','-of','json',clipVideoPath(owner,request.startClipId)],{windowsHide:true,timeout:15000})
+    dimensions=JSON.parse(result.stdout).streams?.[0]
+  } else {
+    const id=request.imageAId || request.identityStillId
+    if (id) {
+      getStill(owner,id)
+      dimensions=imageDimensions(readFileSync(stillPath(owner,id)))
+      if (!dimensions) throw new Error('Cannot measure the source still.')
+    }
+  }
+  if (video && request.startClipId && !dimensions?.width) throw new Error('Cannot measure the previous clip.')
+  Object.assign(request.settings,resolveSize(request.settings.aspect,dimensions))
+}
diff --git a/shared/studio2/contracts.mjs b/shared/studio2/contracts.mjs
index ad47e5a..a359d6b 100644
--- a/shared/studio2/contracts.mjs
+++ b/shared/studio2/contracts.mjs
@@ -1,3 +1,4 @@
+import { queueSeeds } from './seed.mjs'
 import { sectionsFrom, compileSections } from './prompt.mjs'
 export { sectionsFrom } from './prompt.mjs'
 export const cameraFamilies = ['static','dolly in','dolly out','pan left','pan right','tilt up','tilt down','zoom in','zoom out','orbit left','orbit right']
@@ -35,7 +36,7 @@ export function validateRequest(raw, xaigen = false) {
   const promptSections = sectionsFrom(raw.promptSections || {action:raw.prompt || ''})
   if (!promptSections.action.trim()) fail('Enter an action prompt.')
   const number=(key, fallback, min, max) => { const n=Number(raw.settings?.[key] ?? fallback); if (!Number.isFinite(n)||n<min||n>max) fail(`Invalid ${key}.`); return n }
-  for (const key of ['steps','seed']) if (!Number.isInteger(number(key,key==='steps'?24:1,0,2147483647))) fail(`Invalid ${key}.`)
+  for (const key of ['steps']) if (!Number.isInteger(number(key,key==='steps'?24:1,0,2147483647))) fail(`Invalid ${key}.`)
   for (const key of ['width','height']) if (number(key,key==='width'?1344:768,256,4096)%32) fail('Dimensions must be multiples of 32.')
   const duration=number('duration',5,1,15)
   if (video) {
@@ -44,10 +45,11 @@ export function validateRequest(raw, xaigen = false) {
     if (raw.lockFace === false && raw.lockOutfit === false && !raw.imageAId && !raw.startClipId) fail('Choose a start still or previous clip when both identity locks are off.')
   }
   const frames=Math.ceil((duration*number('fps',24,1,60)-5)/17)*17+5
-  return { mode, engine, lockFace:raw.lockFace !== false, lockOutfit:raw.lockOutfit !== false, hideInput:!!raw.hideInput, folderId:String(raw.folderId), identityStillId:raw.identityStillId || '', imageAId:raw.imageAId || '', imageBId:raw.imageBId || '', maskId:raw.maskId || '', startClipId:raw.startClipId || '', endStillId:raw.endStillId || '',
+  const shotSeeds=queueSeeds(raw.settings,1+(Array.isArray(raw.batch)?raw.batch.length:0))
+  return { mode, engine, shotSeeds, lockFace:raw.lockFace !== false, lockOutfit:raw.lockOutfit !== false, hideInput:!!raw.hideInput, folderId:String(raw.folderId), identityStillId:raw.identityStillId || '', imageAId:raw.imageAId || '', imageBId:raw.imageBId || '', maskId:raw.maskId || '', startClipId:raw.startClipId || '', endStillId:raw.endStillId || '',
     startFrameSource: raw.startClipId ? {kind:'previous-last-frame',clipId:raw.startClipId} : {kind:'still',stillId:raw.imageAId || ''},
     promptSections, compiledPrompt:compilePrompt(promptSections,video,raw),
-    settings: { aspect:['auto','16:9','9:16','1:1'].includes(raw.settings?.aspect)?raw.settings.aspect:'auto', fps:number('fps',24,1,60), width:number('width',1344,256,4096),height:number('height',768,256,4096),steps:number('steps',video?8:24,1,100),cfg:number('cfg',video?1.5:4,0,20),seed:number('seed',Math.floor(Math.random()*2147483647),0,2147483647),duration:number('duration',5,1,15),turbo:raw.settings?.turbo !== false, loraStack:Array.isArray(raw.settings?.loraStack)?raw.settings.loraStack:[] },
+    settings: { aspect:['auto','16:9','9:16','1:1'].includes(raw.settings?.aspect)?raw.settings.aspect:'auto', fps:number('fps',24,1,60), width:number('width',1344,256,4096),height:number('height',768,256,4096),steps:number('steps',video?8:24,1,100),cfg:number('cfg',video?1.5:4,0,20),seedMode:raw.settings?.seedMode==='locked'?'locked':'random',seed:shotSeeds[0],duration:number('duration',5,1,15),turbo:raw.settings?.turbo !== false, loraStack:Array.isArray(raw.settings?.loraStack)?raw.settings.loraStack:[] },
     guides: (Array.isArray(raw.guides)?raw.guides:[]).slice(0,8).map(g=>{ if (!g.stillId || !Number.isInteger(g.frame) || g.frame<1 || g.frame>=frames) fail('Each guide requires a still and positive frame index.'); return {stillId:String(g.stillId),frame:g.frame} }),
     batch: (Array.isArray(raw.batch)?raw.batch:[]).slice(0,30).map(s=>{const next=sectionsFrom({...promptSections,...(typeof s==='string'?{action:s}:s)});if(!next.action.trim())fail('Every shot needs an action prompt.');return next}) }
 }
diff --git a/shared/studio2/graphs.mjs b/shared/studio2/graphs.mjs
index 5adf8ab..4a5e17a 100644
--- a/shared/studio2/graphs.mjs
+++ b/shared/studio2/graphs.mjs
@@ -34,3 +34,17 @@ export function attachHeroReference(g, image) {
   }
   return g
 }
+/** The shared image builders have their own defaults and megapixel scalers.
+ * Studio 2 must send its already resolved canvas size through those nodes. */
+export function applyResolvedImageSize(graph, {width,height}) {
+  for (const node of Object.values(graph)) {
+    if (node.class_type === 'ImageScaleToTotalPixels') {
+      node.class_type='ImageScale'
+      node.inputs={image:node.inputs.image,upscale_method:'lanczos',width,height,crop:'disabled'}
+    } else {
+      if (typeof node.inputs?.width === 'number') node.inputs.width=width
+      if (typeof node.inputs?.height === 'number') node.inputs.height=height
+    }
+  }
+  return graph
+}
diff --git a/shared/studio2/input.mjs b/shared/studio2/input.mjs
index 93dd430..c95b951 100644
--- a/shared/studio2/input.mjs
+++ b/shared/studio2/input.mjs
@@ -11,8 +11,9 @@ export function bindClip(form, clip) {
   if (!clip?.id) return form
   const saved = clip.studio2 || {}, settings = saved.settings || clip.settings || clip
   const next = {...form, startClipId:clip.id, settings:{...form.settings}}
+  next.settings.aspect=['auto','16:9','9:16','1:1'].includes(settings.aspect)?settings.aspect:'auto'
   for (const key of ['duration','aspect','width','height','fps','loraStack','turbo','steps','cfg']) {
-    if (settings[key] != null) next.settings[key] = structuredClone(settings[key])
+    if (settings[key] != null && key!=='aspect') next.settings[key] = structuredClone(settings[key])
   }
   next.engine = saved.engine || clip.engine || 'minimax'
   if (saved.identityStillId) next.identityStillId = saved.identityStillId
@@ -23,7 +24,12 @@ export function bindClip(form, clip) {
 export function restoreAsset(form, item) {
   const restored = restoreInput(item)
   const next = {...form,...restored,settings:{...form.settings,...restored.settings}}
-  return item.kind === 'clip' || item.studio2?.kind === 'video' ? {...bindClip(next,item),mode:'extend'} : next
+  next.settings.seedMode='random'
+  if (item.kind === 'clip' || item.studio2?.kind === 'video') return {...bindClip(next,item),mode:'extend'}
+  next.imageAId=item.id
+  next.startClipId=''
+  next.settings.aspect=item.studio2?.settings?.aspect || item.settings?.aspect || 'auto'
+  return next
 }
 export function extendSelected(form, clip) {
   // Switching task on the already bound clip must preserve the user's overrides.
diff --git a/shared/studio2/seed.mjs b/shared/studio2/seed.mjs
new file mode 100644
index 0000000..f79fb7e
--- /dev/null
+++ b/shared/studio2/seed.mjs
@@ -0,0 +1,17 @@
+let previous
+export function randomSeed() {
+  const bytes = new Uint32Array(1)
+  globalThis.crypto.getRandomValues(bytes)
+  let seed = 2 + bytes[0] % 2147483646
+  if (seed === previous) seed = seed === 2147483647 ? 2 : seed + 1
+  previous = seed
+  return seed
+}
+export function queueSeeds(settings = {}, count = 1) {
+  if (settings.seedMode === 'locked') {
+    const seed=Number(settings.seed)
+    if (!Number.isInteger(seed) || seed<0 || seed>2147483647) throw Object.assign(new Error('Invalid seed.'),{statusCode:400})
+    return Array(count).fill(seed)
+  }
+  return Array.from({length:count},()=>randomSeed())
+}
diff --git a/shared/studio2/viewer.mjs b/shared/studio2/viewer.mjs
new file mode 100644
index 0000000..8a80765
--- /dev/null
+++ b/shared/studio2/viewer.mjs
@@ -0,0 +1,14 @@
+export function folderAssets(library, jobs, folderId) {
+  const assets=new Map()
+  for (const kind of ['still','clip']) for (const asset of library[kind==='still'?'stills':'clips'] || []) {
+    if (asset.folderId===folderId) assets.set(asset.id,{...asset,kind})
+  }
+  for (const job of jobs) if (job.request.folderId===folderId) for (const asset of job.outputs || []) assets.set(asset.id,{...assets.get(asset.id),...asset})
+  return [...assets.values()].sort((a,b)=>(a.createdAt || a.studio2?.savedAt || 0)-(b.createdAt || b.studio2?.savedAt || 0))
+}
+export function newestOutput(jobs, seen, folderId) {
+  const fresh=jobs.filter(j=>j.request.folderId===folderId).flatMap(j=>j.outputs || []).filter(a=>!seen.has(a.id))
+  return fresh.sort((a,b)=>(a.studio2?.savedAt || 0)-(b.studio2?.savedAt || 0)).at(-1) || null
+}
+export function selectResult(state, asset) { return {...state,selected:asset} }
+export function assetLabel(asset) { return asset?.name || asset?.originalName || (asset ? `Still ${asset.id.slice(0,8)}` : 'None') }
diff --git a/tests/studio2-canvas-seed.test.mjs b/tests/studio2-canvas-seed.test.mjs
new file mode 100644
index 0000000..2b1fa53
--- /dev/null
+++ b/tests/studio2-canvas-seed.test.mjs
@@ -0,0 +1,34 @@
+import test from 'node:test'
+import assert from 'node:assert/strict'
+import {folderAssets,newestOutput,selectResult} from '../shared/studio2/viewer.mjs'
+import {restoreAsset,resolveSize} from '../shared/studio2/input.mjs'
+import {validateRequest} from '../shared/studio2/contracts.mjs'
+import {applyResolvedImageSize} from '../shared/studio2/graphs.mjs'
+const base={mode:'generate',engine:'flux',folderId:'f',prompt:'Walk'}
+test('completed outputs join all folder assets and select only the output canvas',()=>{
+ const source={id:'source',folderId:'f'},output={id:'result',kind:'still',studio2:{savedAt:2}}
+ const jobs=[{request:{folderId:'f'},outputs:[output]}],library={stills:[source,{id:'other',folderId:'f'}],clips:[{id:'video',folderId:'f'}]}
+ const strip=folderAssets(library,jobs,'f');assert.equal(strip.length,4)
+ const state=selectResult({imageAId:'source',startClipId:'existing'},newestOutput(jobs,new Set(),'f'))
+ assert.equal(state.selected.id,'result');assert.equal(state.imageAId,'source');assert.equal(state.startClipId,'existing')
+ assert.equal(newestOutput(jobs,new Set(['result']),'f'),null)
+})
+test('Use as input binds the selected still, not its original parent input',()=>{
+ const next=restoreAsset({settings:{}},{id:'output',kind:'still',studio2:{imageAId:'old-parent',settings:{aspect:'1:1',seed:1}}})
+ assert.equal(next.imageAId,'output');assert.equal(next.startClipId,'');assert.equal(next.settings.aspect,'1:1');assert.equal(next.settings.seedMode,'random')
+})
+test('resolved aspect survives image graph default and megapixel scaling',()=>{
+ for(const aspect of ['auto','1:1','16:9','9:16']) {
+  const size=resolveSize(aspect,{width:1024,height:1024})
+  const request=validateRequest({...base,settings:{aspect,...size}})
+  const graph=applyResolvedImageSize({latent:{inputs:{width:1344,height:768}},scale:{class_type:'ImageScaleToTotalPixels',inputs:{image:['load',0],megapixels:1}}},request.settings)
+  assert.equal(graph.latent.inputs.width,size.width);assert.equal(graph.latent.inputs.height,size.height)
+  assert.equal(graph.scale.inputs.crop,'disabled');assert.equal(graph.scale.inputs.width,size.width)
+  if(['auto','1:1'].includes(aspect))assert.equal(size.width,size.height)
+ }
+})
+test('random Queues and shots differ; typed seed including 1 remains locked',()=>{
+ const a=validateRequest({...base,batch:['Turn','Sit']}),b=validateRequest(base)
+ assert.notEqual(a.settings.seed,b.settings.seed);assert.equal(new Set(a.shotSeeds).size,3);assert.ok(a.shotSeeds.every(s=>s!==1))
+ for(const seed of [1,987]){const raw={...base,batch:['Turn'],settings:{seedMode:'locked',seed}};assert.deepEqual(validateRequest(raw).shotSeeds,[seed,seed]);assert.equal(validateRequest(raw).settings.seed,seed)}
+})
diff --git a/tests/studio2-runner.test.mjs b/tests/studio2-runner.test.mjs
index 8956ef1..5259405 100644
--- a/tests/studio2-runner.test.mjs
+++ b/tests/studio2-runner.test.mjs
@@ -1,3 +1,4 @@
+import {queueSeeds} from '../shared/studio2/seed.mjs'
 import test from 'node:test'
 import assert from 'node:assert/strict'
 import {readFileSync,mkdtempSync,mkdirSync,writeFileSync,existsSync} from 'node:fs'
@@ -16,7 +17,7 @@ function fixture(mode='video') {
  const job={status:'running',clientId:'client',library:{}}
  let id=0
  const scope={
-  watchProgress:()=>()=>{},compilePrompt,saveRecord(){},update(r,state){r.state=state;phases.push(state)},acquireSharedGpu:async()=>true,ensureComfyReady:async()=>{},emitJob(){},
+  queueSeeds,watchProgress:()=>()=>{},compilePrompt,saveRecord(){},update(r,state){r.state=state;phases.push(state)},acquireSharedGpu:async()=>true,ensureComfyReady:async()=>{},emitJob(){},
   prepareGraph:async r=>{queued.push({hero:r.request.identityStillId,start:r.request.startClipId,action:r.request.promptSections.action});return {}},queuePrompt:async()=>({prompt_id:`p${++id}`}),
   fetchHistory:async p=>({[p]:{status:{status_str:'success'},outputs:{}}}),comfyFetch:()=>{throw new Error('Unexpected network call')},
   extractVideo:()=>({filename:'video.mp4',subfolder:'preview/studio2/r',type:'output'}),extractEditedImage:()=>({filename:'image.png',subfolder:'preview/studio2/r',type:'output'}),