flutter_scene 0.24.3

• A frame that re-presents its previous image while the GPU catches up no longer uploads joint matrices or light data first. On Vulkan each upload waited for the GPU backlog, so a GPU-bound scene with skinned meshes or moving lights blocked the UI thread for about a frame of GPU time (230 ms down to 40 ms at p95 on a Galaxy A16).
• Meshes lit by point and spot lights batch into instanced draws again. Every item got its own light list, so any ranged light split every batch; items with identical lists now share one, and froxel-lit views ignore the lists.
• Lit materials draw with a lean shader when the scene uses no irradiance field, rect area lights, environment cross-fade, parallax reflection box, ambient occlusion, or point-light shadows. It stops the full shader spilling registers on mobile GPUs (frames 1.5 to 1.8x faster on a Mali-G57) and adds about 250 KB compressed to each platform's shader bundle.
• Scene.warmUp takes allShadingTiers (and SceneView takes warmUpAllShadingTiers), which also compiles the shader tier the scene is not using, so turning one of those features on or off later does not stall a frame.
• Camera.right, Camera.horizontalForward, and Camera.horizontalRight, plus Node.forward, Node.right, and Node.up, give the world-space basis for movement and aiming without deriving it by hand.