Constructing and animating solid objects in CoreAnimation

[screwtape]

Hi,

I'm trying to avoid using OpenGL for an app where I want to animate a fairly simple solid object. I've constructed a very simple version by adding layers to a view and rotating the layers in 3d, but since the layers are all flat and rectangular, this doesn't produce a very convincing result.

Has anyone done any "Solid constructions" in CoreAnimation, or should I just give up and render in OpenGL (and therefore learn another API while I'm at it)?

I think core animation has the capability be able to do what I want, even though I realise that isn't what it's designed for; I'm just not sure how to go about it.

Screwtape.