After Effects fade-in/out of master composition

[gcoffee]

I've got the following set up:

Composition 1:
- Layer A
- Layer B

Composition 2:
- Composition 1

That is, Composition 1, which is made up of two layers A and B, is nested in Composition 2.

Really all Composition 2 is for is to allow me to fade in and out the beginning and end of Composition 1. Problem is, when I do this (by changing the opacity of the nested Composition 1 in Composition 2), it seems to affect how the two layers in Composition 1 are mixed, i.e., the Layer B begins to show through Layer A even though when I'm viewing it straight in Composition 1, there's no bleed-through of transparency. All layer blending is set to Normal.

Any ideas?

[Matt Grunau]

I just trid what you describe and it worked fine. I had two solid layers, faded out the top to reveal the bottom. Then I brought the comp1 into comp2 and faded comp 1 up from 0 to 100 . It did not reveal layer 2 of comp one, and did what it should be. Maybe you could describe a little better what is going on in comp 1? ALso, you might want to try precomposing the two layers and then use that new "layer set (kinda like layer sets in Photoshop)" composition still in comp 1 and just fade that in or out as you want.