For world space something like this should work: let distance = simd_distance(entityA.position(relativeTo: nil), entityB.position(relativeTo: nil))

I think you can drag and drop images into RealityComposer which are then essentially rendered like a plane with an Unlit Material, but afaik you can not set an Unlit Material for existing models explicitly via Reality Composer.

Hi, is your UIView static or does it change a lot? If it's just a static view you could create a snapshot, extract it's CGImage and convert that into a TextureResource (https://developer.apple.com/documentation/realitykit/textureresource/3768851-generate) that could be mapped on whatever model you want. In case it is animated I assume you could render that view with your desired update interval into a Metal Texture and then use the DrawableQueue API to update your material with the new texture: https://developer.apple.com/documentation/realitykit/textureresource/drawablequeue Maybe this GitHub sample I've done could help you with the latter option: https://github.com/arthurschiller/realitykit-drawable-queue

If I understood your question correctly something like this should work: var targetTransform = entityToAnimate.transform targetTransform.translation.x += 0.4 let animationPlaybackController = entityToAnimate.move(to: targetTransform, relativeTo: entityToAnimate.parent, duration: 3, timingFunction: .easeOut) arView.scene.subscribe(to: AnimationEvents.PlaybackCompleted.self, on: entityToAnimate) { [weak self] event in     if event.playbackController == animationPlaybackController {         print("Animation completed!")     } } .store(in: &subscriptions)

If anyone from Apple is reading – I've created a radar with a sample project attached (FB9670736).

Alright, I'm an idiot. So apparently you need to explicitly set the blending property also on your CustomMaterial to make it work, which kinda makes sense but wasn't clear for me right away. So for example this: guard var customMaterial = try? CustomMaterial(…) else { return } customMaterial.blending = .transparent(opacity: .init(floatLiteral: 1)) // .transparent is important! – floatliteral can be whatever customMaterial.faceCulling = .none customMaterial.emissiveColor = .init(color: .red) works fine with proper blending of faces behind the object. Whereas if you don't specify the blending the default is .opaque and then if you would set the opacity in your fragment shader like so: surface.set_opacity(0); the CustomMaterial kinda works similar to an Occlusion Material from my testing and hides everything behind it. What I haven't found out yet is how I can disabling the color banding when setting a black and white gradient texture as the blending texture. Will investigate and maybe file feedback for that!

Thanks for the tip but unfortunately that does not make any difference. I've already tried a lot of variants. Should I create a sample project? I'm starting to think this issue might be exclusive to CustomMaterial. Based on these docs: https://developer.apple.com/metal/Metal-RealityKit-APIs.pdf […] If there are two entities, one in front of the other, for example, and the closer entity is translucent, both of those entity’s fragments contribute to the final color of that one pixel. I feel like this should work? Otherwise if I stay with the first variant, do you have any idea how I could get rid of the gradient banding?

Just as a general comment – I think instead of creating a new anchor on every frame explicitly there is also a reanchor method on AnchorEntity that you could use (set preservingWorldTransform to false).

@CodeName I've just published a little sample project showing how to use DrawableQueue to implement transparent animated GIFs in RealityKit 2. Let me know if it's helpful. :) https://github.com/arthurschiller/realitykit-drawable-queue