I've got a layer I need to render as an alpha. Sounds easy enough. My problem is, the layer has a drop shadow, and is also under another drop shadow. It's sandwiched in the middle of about five layers, inside of a precomp, which is animated in 3d space. Is there any way to make a layer buried this deep into an alpha channel and keep all of my drop shadows? Thanks!
I would save off a copy of the project first, so you can get back to where you were. Depending on how the drop shadows were generated, you can usually turn on a switch that says "drop shadow only" - this will turn off the layer, but leave the shadow. You don't say whether there is already an alpha with the main layer you want, so I'll assume there is. You may also need to work in your precomp, if that's where the shadow layers are - the Solo button in the comp might come in handy as well.