feat(blender): add city destruction simulation scene and compositor pipeline

_render_no_outputfile.py

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+import bpy, os, time, json, glob
+
+project_dir = 'C:/Users/downl/Documents/New project/hermes-agent'
+frames_dir = project_dir + '/render_frames'
+scene = bpy.context.scene
+
+# === COMPOSITOR WITHOUT OUTPUTFILE ===
+if scene.compositing_node_group:
+    bpy.data.node_groups.remove(scene.compositing_node_group)
+
+cg = bpy.data.node_groups.new('FinalComp', 'CompositorNodeTree')
+scene.compositing_node_group = cg
+scene.render.use_compositing = True
+
+# Nodes (NO OutputFile - just chain to scene output)
+rl = cg.nodes.new('CompositorNodeRLayers'); rl.location = (0, 100)
+glare = cg.nodes.new('CompositorNodeGlare'); glare.location = (250, 200)
+glare.inputs['Strength'].default_value = 3.0
+glare.inputs['Size'].default_value = 10.0
+glare.inputs['Iterations'].default_value = 6
+glare.inputs['Highlights Threshold'].default_value = 0.2
+
+rgb = cg.nodes.new('CompositorNodeRGB'); rgb.location = (250, -200)
+rgb.outputs['Color'].default_value = (1.0, 1.0, 1.0, 1.0)
+
+alpha = cg.nodes.new('CompositorNodeAlphaOver'); alpha.location = (500, 100)
+alpha.inputs['Fac'].default_value = 0.0
+
+# LINKS
+cg.links.new(rl.outputs['Image'], glare.inputs['Image'])
+cg.links.new(glare.outputs['Image'], alpha.inputs['Background'])
+cg.links.new(rgb.outputs['Color'], alpha.inputs['Foreground'])
+# Alpha output goes to scene render result (no terminal node needed in 5.2)
+
+# Keyframe
+fac = alpha.inputs['Fac']
+fac.default_value = 0.0; fac.keyframe_insert('default_value', frame=1)
+fac.keyframe_insert('default_value', frame=130)
+fac.default_value = 1.0; fac.keyframe_insert('default_value', frame=180)
+
+# Scene settings (PNG output)
+scene.render.resolution_x = 1920
+scene.render.resolution_y = 1080
+scene.frame_start = 1; scene.frame_end = 180
+scene.render.fps = 24; scene.render.film_transparent = False
+scene.render.use_motion_blur = False
+scene.render.filepath = frames_dir + '/frame_'
+scene.render.image_settings.file_format = 'PNG'
+scene.render.image_settings.color_mode = 'RGBA'
+
+bpy.ops.wm.save_as_mainfile(filepath=project_dir + '/city_destruction.blend')
+
+# === RENDER ===
+print('RENDERING 180 frames (no OutputFile node)...')
+t0 = time.time()
+bpy.ops.render.render(animation=True)
+t1 = time.time()
+
+pngs = sorted(glob.glob(frames_dir + '/frame_[0-9][0-9][0-9][0-9].png'))
+result = {
+    'frames': len(pngs),
+    'duration': round(t1 - t0, 1),
+}
+if pngs:
+    sizes = set(os.path.getsize(f) for f in pngs)
+    result['unique_sizes'] = len(sizes)
+    result['size_range'] = [min(sizes), max(sizes)]
+    result['sample'] = [(os.path.basename(f), os.path.getsize(f)) for f in [pngs[0], pngs[len(pngs)//2], pngs[-1]]]
+
+print('DONE:' + json.dumps(result))

_setup_compositor_final.py

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+import bpy, os, json
+
+scene = bpy.context.scene
+
+# Remove old compositor and create simplified one WITHOUT OutputFile
+if scene.compositing_node_group:
+    bpy.data.node_groups.remove(scene.compositing_node_group)
+
+cg = bpy.data.node_groups.new('CityDestructionComp', 'CompositorNodeTree')
+scene.compositing_node_group = cg
+scene.render.use_compositing = True
+
+# Nodes
+rl = cg.nodes.new('CompositorNodeRLayers')
+rl.location = (0, 100)
+
+glare = cg.nodes.new('CompositorNodeGlare')
+glare.location = (250, 200)
+glare.inputs['Strength'].default_value = 3.0
+glare.inputs['Size'].default_value = 10.0
+glare.inputs['Iterations'].default_value = 6
+glare.inputs['Highlights Threshold'].default_value = 0.2
+
+rgb = cg.nodes.new('CompositorNodeRGB')
+rgb.location = (250, -200)
+rgb.outputs['Color'].default_value = (1.0, 1.0, 1.0, 1.0)
+
+alpha = cg.nodes.new('CompositorNodeAlphaOver')
+alpha.location = (500, 100)
+alpha.inputs['Fac'].default_value = 0.0
+
+# NO OutputFile - just connect alpha output to... nothing?
+# In Blender 5.2, the last node in chain defines compositor output
+# But without Composite node, how does it work?
+
+# Actually, in Blender 5.2 compositor auto-applies the node tree
+# to the render result. Let's add a Viewer node as terminal
+# instead of OutputFile.
+viewer = cg.nodes.new('CompositorNodeViewer')
+viewer.location = (750, 100)
+
+# Links
+cg.links.new(rl.outputs['Image'], glare.inputs['Image'])
+cg.links.new(glare.outputs['Image'], alpha.inputs['Background'])
+cg.links.new(rgb.outputs['Color'], alpha.inputs['Foreground'])
+cg.links.new(alpha.outputs['Image'], viewer.inputs['Image'])
+
+# Keyframe Fac
+fac = alpha.inputs['Fac']
+fac.default_value = 0.0
+fac.keyframe_insert('default_value', frame=1)
+fac.keyframe_insert('default_value', frame=130)
+fac.keyframe_insert('default_value', frame=131)  # hold at 0
+fac.default_value = 1.0
+fac.keyframe_insert('default_value', frame=180)
+
+result = {
+    'nodes': [n.name for n in cg.nodes],
+    'links_count': len(cg.links),
+    'success': True
+}
+
+print('COMPOSITOR:' + json.dumps(result, default=str))
+
+# Now render a test frame
+scene.render.filepath = 'render_frames/frame_'
+scene.render.image_settings.file_format = 'PNG'
+scene.render.image_settings.color_mode = 'RGBA'
+scene.frame_set(90)
+
+# Quick Eevee optimization
+scene.eevee.use_gtao = False
+scene.eevee.use_bloom = False  # using compositor glare instead
+scene.render.use_motion_blur = False
+
+bpy.ops.render.render(write_still=True, scene=scene.name)
+
+# Check output
+out_path = 'render_frames/frame_0090.png'
+if os.path.exists(out_path):
+    result['test_frame_size'] = os.path.getsize(out_path)
+    result['test_frame_path'] = out_path
+else:
+    # Check what files appeared
+    import glob
+    pngs = sorted(glob.glob('render_frames/frame_0*.png'))
+    result['new_files'] = [f for f in pngs[-3:]]
+    if result['new_files']:
+        result['test_frame_size'] = os.path.getsize(result['new_files'][-1])
+
+print('TEST:' + json.dumps(result, default=str))