Core Animation is mostly 2D

Being a layer engine, Core Animation doesn't care much about 3D. Yes, you can setup a projection transform but it will be limited :
  • myLayer.transform = projectionTransform only myLayer will have perspective, not its sublayers
  • myLayer.sublayerTransform = projectionTransform only myLayer's sublayers will have perspective, not myLayer nor its sublayers's sublayers

If you want a CALayer to have perspective and one of its sublayers to also have perspective, make sure they both have a perspective transform applied.

I find myself treating CALayers as if they were living in a 3D world, but Core Animation is not a mini OpenGL to handle textured rectangles. I wish it were, though.

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