diff --git a/apps/editor/app/viewer/[id]/thumbnail-generator.tsx b/apps/editor/app/viewer/[id]/thumbnail-generator.tsx
index df885751..4dec9b9f 100644
--- a/apps/editor/app/viewer/[id]/thumbnail-generator.tsx
+++ b/apps/editor/app/viewer/[id]/thumbnail-generator.tsx
@@ -5,6 +5,7 @@ import { useThree } from '@react-three/fiber'
 import { useEffect, useRef } from 'react'
 import * as THREE from 'three'
 import { uploadProjectThumbnail } from '@/features/community/lib/projects/actions'
+import { useProjectStore } from '@/features/community/lib/projects/store'
 
 const THUMBNAIL_WIDTH = 1920
 const THUMBNAIL_HEIGHT = 1080
@@ -70,8 +71,7 @@ export const ThumbnailGenerator = ({ projectId: propProjectId }: ThumbnailGenera
             const result = await uploadProjectThumbnail(projectId, blob)
 
             if (result.success) {
-              console.log('✅ Thumbnail uploaded successfully!')
-              console.log('🔗 URL:', result.data.thumbnail_url)
+              useProjectStore.getState().updateActiveThumbnail(result.data.thumbnail_url)
             } else {
               console.error('❌ Failed to upload thumbnail:', result.error)
             }
diff --git a/apps/editor/components/ui/sidebar/panels/settings-panel/index.tsx b/apps/editor/components/ui/sidebar/panels/settings-panel/index.tsx
index b71e997e..a5d896a2 100644
--- a/apps/editor/components/ui/sidebar/panels/settings-panel/index.tsx
+++ b/apps/editor/components/ui/sidebar/panels/settings-panel/index.tsx
@@ -71,15 +71,9 @@ export function SettingsPanel() {
   };
 
   const handleGenerateThumbnail = () => {
-    if (!projectId) {
-      console.error('❌ No project ID found');
-      return;
-    }
-    console.log('🎯 Generate thumbnail clicked for project:', projectId);
+    if (!projectId) return;
     setIsGeneratingThumbnail(true);
     emitter.emit('camera-controls:generate-thumbnail', { projectId });
-    console.log('📤 Event emitted with project ID:', projectId);
-    // Reset loading state after a delay (thumbnail generation is async)
     setTimeout(() => setIsGeneratingThumbnail(false), 3000);
   };
 
@@ -106,6 +100,16 @@ export function SettingsPanel() {
           <label className="font-medium text-muted-foreground text-xs uppercase">
             Thumbnail
           </label>
+          {activeProject?.thumbnail_url && (
+            <div className="rounded overflow-hidden border border-border aspect-video w-full bg-muted">
+              {/* eslint-disable-next-line @next/next/no-img-element */}
+              <img
+                src={activeProject.thumbnail_url}
+                alt="Project thumbnail"
+                className="w-full h-full object-cover"
+              />
+            </div>
+          )}
           <Button
             className="w-full justify-start gap-2"
             onClick={handleGenerateThumbnail}
diff --git a/apps/editor/features/community/lib/projects/actions.ts b/apps/editor/features/community/lib/projects/actions.ts
index e83fa881..e2f9d736 100644
--- a/apps/editor/features/community/lib/projects/actions.ts
+++ b/apps/editor/features/community/lib/projects/actions.ts
@@ -1020,16 +1020,14 @@ export async function uploadProjectThumbnail(
       return { success: false, error: 'Not authorized to update this project' }
     }
 
-    // Generate a unique filename
-    const timestamp = Date.now()
-    const filename = `${projectId}/${timestamp}.png`
+    const filename = `${projectId}/thumbnail.png`
 
-    // Upload to Supabase Storage
+    // Upload to Supabase Storage (upsert to override existing thumbnail)
     const { data: uploadData, error: uploadError } = await supabase.storage
       .from('project-thumbnails')
       .upload(filename, blob, {
         contentType: 'image/png',
-        upsert: false,
+        upsert: true,
       })
 
     if (uploadError) {
@@ -1041,7 +1039,7 @@ export async function uploadProjectThumbnail(
       .from('project-thumbnails')
       .getPublicUrl(uploadData.path)
 
-    const thumbnailUrl = urlData.publicUrl
+    const thumbnailUrl = `${urlData.publicUrl}?t=${Date.now()}`
 
     // Update the project with the new thumbnail URL
     const { error: updateError } = await (supabase
diff --git a/apps/editor/features/community/lib/projects/store.ts b/apps/editor/features/community/lib/projects/store.ts
index afe83172..1695f954 100644
--- a/apps/editor/features/community/lib/projects/store.ts
+++ b/apps/editor/features/community/lib/projects/store.ts
@@ -22,6 +22,7 @@ interface ProjectStore {
   fetchActiveProject: () => Promise<void>
   setActiveProject: (projectId: string) => Promise<void>
   initialize: () => Promise<void>
+  updateActiveThumbnail: (thumbnailUrl: string) => void
 }
 
 export const useProjectStore = create<ProjectStore>((set, get) => ({
@@ -78,6 +79,15 @@ export const useProjectStore = create<ProjectStore>((set, get) => ({
     }
   },
 
+  // Patch the active project's thumbnail URL in place (no refetch)
+  updateActiveThumbnail: (thumbnailUrl: string) => {
+    set((state) => ({
+      activeProject: state.activeProject
+        ? { ...state.activeProject, thumbnail_url: thumbnailUrl }
+        : null,
+    }))
+  },
+
   // Initialize - fetch both projects and active project
   initialize: async () => {
     set({ isLoading: true })
diff --git a/apps/editor/next.config.ts b/apps/editor/next.config.ts
index 1f367349..bd08139b 100644
--- a/apps/editor/next.config.ts
+++ b/apps/editor/next.config.ts
@@ -2,6 +2,11 @@ import type { NextConfig } from 'next'
 
 const nextConfig: NextConfig = {
   transpilePackages: ['three', '@pascal-app/viewer', '@pascal-app/core'],
+  experimental: {
+    serverActions: {
+      bodySizeLimit: '10mb',
+    },
+  },
   images: {
     remotePatterns: [
       {