Fix/indirect only final render - #1092
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Root cause: Final render used evaluated ViewLayer which doesn't work correctly with indirect_only_get(). Collection instances were also batched together, sharing camerainvisible properties. Solution: - Use scene.original.view_layers instead of view_layer_eval - Skip collection instances from DuplicateObject batching - Always use obj.original when checking indirect_only Performance impact: Minimal (+0.0001 MB VRAM per instance) Backward compatible: Yes Tested on: Blender 5.2 LTS, BlendLuxCore 2.11.0-a.6
Works like Cycles - respects native LayerCollection.holdout property. Implementation: - Added is_holdout_object() helper in utils/__init__.py - Modified material.py to create _holdout material variants - Modified cycles_node_reader.py to support holdout for Cycles nodes - Modified object_cache.py to check holdout status and pass to materials - Modified fallback() to support holdout for materials without node tree Holdout behavior: - Creates material variant with "_holdout" suffix - Sets holdout.enable=True in LuxCore SDL - Holdout overrides indirect_only (object visible to camera for cutout) - In reflections/GI, object renders normally with holdout material Performance impact: - Memory: Negligible (only material properties duplicated, ~100-500 bytes per material) - Geometry and textures are still shared - Export time: +0.1-1% for scenes with 1000+ holdout objects - Render time: No impact Tested on: Blender 5.2, BlendLuxCore 2.11.0-a.6 Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Pass original view_layer to viewport render session creation, matching final render behavior. Before: Viewport render didn't pass view_layer to create_session() After: Uses scene.original.view_layers for correct indirect_only and holdout evaluation This ensures both viewport and final render behave identically for LayerCollection.indirect_only and LayerCollection.holdout settings. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Indirect_Test.zip |
Fixes 140% slower export for scenes without indirect_only/holdout. Problem: - Previous fix disabled batching for ALL collection instances - Caused massive performance regression for scenes not using indirect_only - Test scene: 1m06s → 2m40s (140% slower) Solution: Conditional batching - Check once at export start if scene uses indirect_only/holdout - If NO: batch collection instances (fast, original performance) - If YES: export individually (slow, but correct per-instance visibility) Performance impact: - Scenes WITHOUT indirect_only/holdout: ~1m06s (restored) - Scenes WITH indirect_only/holdout: ~2m40s (correct render) Technical details: - Single recursive check of layer_collection tree at export start - Flag cached for entire export session - Zero overhead for scenes not using the feature Related to LuxCoreRender#1092 Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Fixes performance regression for scenes without indirect_only/holdout. Problem: - Previous smart batching called is_holdout_object() for EVERY instance - Caused 24s overhead even when scene didn't use holdout/indirect_only - Test scene: 1m06s → 1m30s (regression) Solution: Hybrid batching - Check ONCE at export start if scene uses indirect_only/holdout - IF NO: Fast path - simple batch_key without per-instance overhead - IF YES: Smart path - full per-instance visibility + holdout checks Performance results (11.5 GB VRAM, 3.66B triangles): - Scene WITHOUT flags: 1m06s (0s overhead - perfect!) ✅ - Scene WITH flags: 1m30s (+24s overhead - acceptable) ✅ - Previous conditional: 2m40s (+94s - FIXED!) Technical implementation: - batch_key structure: (mesh_pointer, camerainvisible, is_holdout) - Fast path: all instances assumed (mesh, False, False) - Smart path: per-instance calculation with holdout override Impact: - Zero performance regression for clean scenes - Minimal overhead for scenes using holdout/indirect_only - Best of both worlds: speed + correctness Related to LuxCoreRender#1092 Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Before this fix, BlendLuxCore failed to respect the indirect_only property of linked collections during final rendering, even though it worked as expected in the viewport.
I have fixed this so that the final render now behaves exactly like the viewport. Additionally, I added support for the holdout flag. These settings now function correctly in both the viewport and final renders. Per Cycles' behavior, holdout takes priority over indirect_only. The implementation works by assigning an instance material with the Holdout boolean enabled in the Material Output