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Hi everyone, This happens with Xcode 15.3 (15E204a) and visionOS 1.1.2 (21O231). To reproduce this issue, simply create a new VisionOS app with Metal (see below). Then simply change the following piece of code in Renderer.swift: func renderFrame() { [...] // Set the clear color red channel to 1.0 instead of 0.0. renderPassDescriptor.colorAttachments[0].clearColor = MTLClearColor(red: 1.0, green: 0.0, blue: 0.0, alpha: 0.0) [...] } On the simulator it works as expected while on device it will show a black background with red jagged edges (see below).

Version details: Xcode Version 15.3 beta (15E5178i) visionOS 1.0 (21N301) SDK + visionOS 1.0 (21N305) Simulator (Installed) I'm trying to make a ModelEntity with a CustomMaterial.GeometryModifier for which I also created a metal shader file. The said shader file is extremely simple at this time: #include <metal_stdlib> #include <RealityKit/RealityKit.h> using namespace metal; [[visible]] void ExpandGeometryModifier(realitykit::geometry_parameters params) { // Nothing. } When trying to compile my project, I get the following error: 'RealityKit/RealityKit.h' file not found Is this not supported on VisionOS?