[redfuse] “The problem I’m having now, is that when I use this ‘3d’-composition in another (2d)-comp, all the seperate layers in the 3d-comp shift, so I am assuming that it uses another camera to render the 3d-comp within the 2d comp than I am using within the 3d-comp, if that makes sense.”
No. Unless you use your pre-comp as a 3D layer this should not happen. The pre-comp layer reflects the flattened buffer as seen from inside thre pre-comp. Check that as well whether you are using collapse transformations or not. If you’re looking for a more elegant solution to your problam, use mattes – one reveals the part of the layer and a inverted duplicate cuts out the background layer. By animating opacity or brightness (for luma mattes) along with the “Blend with Original parameter” of the Invert effect on your matte you can get any result you want.
Mylenium
[Pour Myl