The layer
The scene renderer
Static Private vectorStatic Private Readonly zeroZOrderPixi doesn't sort children with zIndex == 0.
Set the texture of the 2D plane in the 3D world to be the same WebGL texture as the PixiJS RenderTexture - so that the 2D rendering can be shown in the 3D world.
The renderer for a gdjs.Layer using Pixi.js.