I'm working in After Effects CC, I've been learning it for a couple of weeks so I'm fairly new. There was one shot where I added a light and I had to learn that you have to change the layer into a 3D layer for the light to appear. Everything's easy peasey, but since then, I tried this on other shots, and all it does is turn the screen black no matter what I do. Has anyone else had this problem? I have no idea what I'm doing wrong. Thanks!