Thanks for your reply. I have implemented 3DGS rendering through the CompositorServices framework, but I want to port it to the RealityKit framework. I am not sure whether RealityKit meets the requirements.I need to render a large number of instanced planes, and completely custom vertex shader and fragment shader code, including using instanceID and discarding pixels. It would be best if I could use metal shader. Can these requirements be met using reality?

Just to add, I need to instantiated and render a large amount of plane and custom shader code. During rendering, blending and dynamic data updates are enabled, and complex calculations are included in the vertex shader code, which relies on the instance_id variable and the discard_frag method. Can LowLevelMesh support custom vertex shader and fragment shader code?

Just to add, I need to instantiated and render a large amount of plane and custom shader code. During rendering, blending and dynamic data updates are required, and complex calculations are included in the vertex shader code, which relies on the instance_id variable and the discard_frag method. Can LowLevelMesh support custom vertex shader and fragment shader code?

Thanks for your reply. Yes, I'm trying to implement 3D Gaussian splatting (aka. 3dgs) using reality, but I'm not sure it can meet the requirements. 3dgs involves a lot of plane rendering, so it needs to be able to support Mesh instancing and fully customize the vertex shader and fragment shader code, preferably using metal shaders.I noticed that shader graph can customize materials through graphics, but it seems that it cannot create very complex calculations.Can you give me some advice?