Hi
I created the VisionOS demo app and tried to use custom material shader for a box model. But I failed to compile the project. XCode says that "'CustomMaterial' is unavailable in xrOS". Is there possible way to use custom shader for ModelEntity of RealityKit in VisionOS?
I don't have an example handy, although I believe some of our sample projects should use MaterialX. You can also watch this session on Reality Composer Pro https://developer.apple.com/videos/play/wwdc2023/10202/.
You can use ShaderGraphMaterial, and create a MaterialX shader graph in Reality Composer Pro.
@Graphics and Games Engineer .
Thank you for your reply.
I tried to make a example file in Reality Composer Pro and load it in the code as follow.
let shader = try ShaderGraphMaterial.load(named: "Material", from: "Untitled.usda", in: Bundle.main)
But, it throws an exception.
Can you make a example for me?
I don't have an example handy, although I believe some of our sample projects should use MaterialX. You can also watch this session on Reality Composer Pro https://developer.apple.com/videos/play/wwdc2023/10202/.
You might take a look at this session video where she goes over working with content from Reality Composer Pro in Xcode (https://developer.apple.com/videos/play/wwdc2023/10273/?time=1818) including materials (toward the end of video).
And the Diorama sample code is available here (https://developer.apple.com/documentation/visionos/diorama), which also might be helpful, specifically the DioramaView where the RealityKitContent is loaded and how they navigate the hierarchy of the Reality Composer Pro scene.
Maybe a workaround for lack of CustomMaterial support: I saw that we can replace a TextureRource with a drawable queue. But I need an example of the shader interface as the RealityKit::surface do not exists anymore on visionOs. Maybe an Apple engineer have a sample somewhere ?