problem with comp nested inside 3D comp
by Mike Stewart
on
Jan 18, 2008 at 4:43:32 pm
I make a composition of a car, call it Car Comp.
Now, I make a new composition with 3D layers and a camera. It's a scene of a desert road.
I drag the Car Comp into this Desert Comp, so the Car Comp is nested within it.
I check the 3D box on the nested Car Comp. Everything works great so far.
But...
If I check the "Collapse Transformations" box next to the Car Comp, I have a problem. As the camera moves, the Car Comp's outline moves like it should, but the actual picture of the car just sits there like it's a 2D layer.
Re: problem with comp nested inside 3D comp by Dave LaRonde on Jan 18, 2008 at 5:17:52 pm
[Mike Stewart]"I make a composition of a car, call it Car Comp....
If I check the "Collapse Transformations" box next to the Car Comp, I have a problem. As the camera moves, the Car Comp's outline moves like it should, but the actual picture of the car just sits there like it's a 2D layer. "
Does this Car Comp have 3D layers in it as well?
You can build a 3D box in a precomp. When you bring the 3D box precomp into another comp, make it a 3D layer AND turn on the Collapse Transformations switch, you now have a 3D object: it's a box. It has a set anchor point in 3D space, so you have to be careful how you build the box in the first place.
Now, if your Car Comp does NOT have 3D layers in it, AE will get a little goofy when you hit the Collpase Transformations switch.
Re: problem with comp nested inside 3D comp by Mike Stewart on Jan 18, 2008 at 5:45:31 pm
Thank you, that did it.
The Car Comp was made entirely of 2D layers. But after reading your reply I went in and made all those layers 3D, without adjusting anything else, now it works fine when nested as a 3D layer with Collapsed Transformations.
"...AE will get a little goofy..."
Glad to hear that. I thought it was me. Thank you!
Re: problem with comp nested inside 3D comp by Darby Edelen on Jan 18, 2008 at 5:55:34 pm
When you enable Collapse Transformations on a pre-comp inside of your current composition that pre-comp layer behaves as though its were actually in the current composition. This means that options that would normally only affect the layers in the pre-comp are carried into the current composition... material options, the motion blur switch, the 3D switch, any blending modes that are set in the pre-comp are applied in the current comp.
If you're familiar with Photoshop you can think of a pre-comp with its transformations collapsed as a layer group with the 'pass through' blending mode (although 3D isn't a consideration in Photoshop).
Darby Edelen Designer Left Coast Digital Santa Cruz, CA
