Reality Composer Pro | UnlitSurface and opacity maps error

Hello,

I'm not 100% confident in this diagnosis at this point, but this sounds like a rendering order issue to me, that is, the rendered result depends on which plane is drawn by the system first. If it is a rendering order issue, then you may be able to resolve this explicitly by using ModelSortGroupComponent. If that doesn't help and you don't think it is a rendering order issue, then I'd need to see the RCP project to help further.

Do you have an example of adding a component to a ModelSortGroup and then setting the order?

something like: let myGroup = ModelSortGroup(depthPass: ModelSortGroup.DepthPass.postPass) let mySort = ModelSortGroupComponent(group: myGroup, order: 2)

How do I setup the group to let the sort order know what components to reference when I set the order?

@KevinTho any luck here? What did you learn or discover?

Thanks in advance for sharing.

Here is an example that uses ModelSortGroup:

import SwiftUI
import RealityKit

struct ContentView: View {
    
    let group = ModelSortGroup(depthPass: .postPass)

    var body: some View {
        VStack {
            RealityView { content in
                
                let innerBox = ModelEntity(mesh: .generateBox(size: 0.05), materials: [SimpleMaterial(color: .red, isMetallic: false)])
                
                let outterBox = ModelEntity(mesh: .generateBox(size: 0.1), materials: [SimpleMaterial(color: .blue, isMetallic: false)])
                
                innerBox.components.set(ModelSortGroupComponent(group: group, order: 1))
                outterBox.components.set(ModelSortGroupComponent(group: group, order: 0))
                
                innerBox.components.set(OpacityComponent(opacity: 0.5))
                outterBox.components.set(OpacityComponent(opacity: 0.5))
                
                let entity = Entity()
                entity.addChild(innerBox)
                entity.addChild(outterBox)
                            
                content.add(entity)
            }
        }
    }
}

Curious to see if the depth group answer solved this issue for you?