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AfterEffects Precomp
show user profile  9krausec
Hey everyone! Just delving into AE the past 3 weeks and had a question for some of you people who use AE...

Why, when you have a few layers that make-up a 3d scene, when you precomp those layers together, it flattens them and makes them 2d (even when that precomp layers is swtiched to a 3d layer)?

Love the idea of precomping layers together, just need to figure out how to stop making my 3d stuff 2d when I precompose something..

Any help would be great, thanks!




- Portfolio-




read 374 times
1/26/2012 8:24:09 PM (last edit: 1/26/2012 8:30:31 PM)
show user profile  Dr. Jim
ah...heh.

Well.....there are some good logical reasons WHY it does that.......as well as your slight misunderstanding of the 3D layer switch.
I dont have time for a dissertation atm...
BUT

If you want your 3D world from the precomp to be 3D and active in your current comp then:
1) Make sure the camera (if you have 1) in the precomp is OFF (eyeball off)
2) In your current comp click the little * looking switch (continually rasterize)....this will allow the transformations (including 3D position) to pass through properly into your current comp.


read 354 times
1/26/2012 9:57:55 PM (last edit: 1/26/2012 9:57:55 PM)
show user profile  9krausec
okay, I'll pull the file up and do just that..

The reason I didn't leave it without the precomp of a few layers is because in the set I precomped I had an adjustment layer and it was effecting some layers I did not want it to effect, but I couldn't change the stack.

I will try your advice, but what I'll also try doing is seeing if I can extract an alpha from the layer I am adjusting and use the alpha as a mask for that adjustment.

Hmmm.. Thanks Doc.




- Portfolio-




read 348 times
1/26/2012 10:18:51 PM (last edit: 1/26/2012 10:18:51 PM)
show user profile  Dr. Jim
Ah...So you have an adjustment layer IN the precomp?
And yes....if you use continually rasterize (which you must in order for 3D space to pass through)...then yes, the adjustment layer will also pass through into your current comp.

Suggestions would be to first ask: MUST you have this adjustment layer? Cant you apply the effects or such to the individual layers wiithin the precomp that need them?

If its an adjustment layer on top of all the layers in the precomp....then simply remove it and apply those effects to the precomp itself, inside the current comp.

Many ways to get around this......I could use clarification on the scenario as I cannot understand why you would use an adjustment layer on only 1 layer (if thats the case)....?
The alpha mask adj layer is not your best bet in any case.


read 342 times
1/26/2012 10:53:11 PM (last edit: 1/26/2012 10:53:11 PM)
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