Material showing only half?

Hi, I'm currently implementing 180° / 360° property for immersive video in my app.

I was able to implement 360° easily by just giving VideoMaterial to flipped sphere.

However, I'm bit stuck at 180°. I want to implement by setting VideoMaterial to hemisphere mesh. But since RealityKit doesn't provide default function such like MeshResource.generateHemisphere yet, I just want to apply VideoMaterial half front visible, and half back transparent. I thought this would make my sphere looks like hemisphere.

But I can't find my way to implement this method.. I would appreciate any advice / idea / information that might help.

Material showing only half?
 
 
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