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Shadows, m34 sublayer transforms, and rotation


Hello.

I'm seeing an issue I don't understand.
If I add a layer, and a shadow - I see the shadow.

If I then rotate the layer:

[child setValue:[NSNumber numberWithFloat:-46] forKeyPath:@"transform.rotation.x"];
[child setValue:[NSNumber numberWithFloat:46] forKeyPath:@"transform.rotation.y"];

And then turn on some depth / perspective on it's superlayer like so:

- (IBAction) toggleDepth:(id)sender {
	CALayer *layer = workbench.workspaceLayer;
	CATransform3D trans = layer.sublayerTransform;
	float val = 420;
	trans.m34 = 1 / - val;
	layer.sublayerTransform = trans;
}

Then both the content of the layer, and it's shadow disappear.
I have made an example to show just this problem alone. Is this a known bug with CA, or am I doing something stupid? The example contains about 77 lines of code total.

http://downloads.shinywhitebox.com/CoreAnimShadow.zip

--
Regards,
Neil Clayton







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