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Collapse Transformation and 3D shadows

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Vicky Sharp
Collapse Transformation and 3D shadows
on Jul 7, 2011 at 11:46:38 pm

I've already had a look on the boards/google to see if I can find a straight forward answer to this, so please excuse me if I've missed something already posted on the topic and please point me in the right direction.

My issue is, I had a group of 3D layers, all with lovely shadows casting over my 'floor'. I then pre-comped them and turned on collapse transformations. Now all my shadows are missing. I have checked cast shadows to on for the new pre-comp and inside the pre-comp all layers have cast shadows turned on. Why are my shadows now not appearing?


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Todd Kopriva
Re: Collapse Transformation and 3D shadows
on Jul 8, 2011 at 1:31:20 am

See this page.

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Todd Kopriva, Adobe Systems Incorporated
Technical Support for professional video software
After Effects Help & Support
Premiere Pro Help & Support
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Walter Soyka
Re: Collapse Transformation and 3D shadows
on Jul 8, 2011 at 1:43:27 am

Are there any 2D layers interspersed among your 3D layers? 2D layers prevent 3D layer intersection and shadow casting.

Are all the lights in your nested comp? If so, they will be ignored and should be moved back into your main comp.

Two relevant pages from the AE docs:
3D layer interactions, render order, and collapsed transformations [link]
Render order and collapsing transformations [link]

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
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Vicky Sharp
Re: Collapse Transformation and 3D shadows
on Jul 8, 2011 at 4:06:55 am

Thanks guys!

Solved...2D layer was affecting render order.


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Nicholas Petersen
Re: Collapse Transformation and 3D shadows
on Mar 7, 2013 at 9:39:55 pm

I'm running in the same situation, but with no 2D layers. My render order, top to bottom, is Spot light; camera; 3D layer; 3D layer; 3D pre-comp with collapsed tranformations. All layers within the pre-comp are also 3D. I tried disabling OpenGL - no luck. I tried creating a new layer using the alpha information of the pre-comp to cast a shadow in it's place - no luck.

What am I missing?


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Vitek Ures
Re: Collapse Transformation and 3D shadows
on Apr 9, 2013 at 9:15:38 pm

Have the same problem. It seems that a 3D layer with collapsed transformation does not support shadow casting. Shame, would save a lot of layers in the main comp.


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Alex Serban
Re: Collapse Transformation and 3D shadows
on Sep 11, 2014 at 7:28:19 pm

Yes, this really is too bad. I wonder what's in the coding that prevents this from being possible?


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