I'm working on an AE project at the moment and it won't let me select any blending mode or track matte on a draft 3d layer, like the option doesn't exist at all. I can see track mattes on a non draft 3d layer, so it's not like I've just left it off by mistake. I'm also not viewing with adaptive resolution, which I know can sometimes cause issues.
If it helps, the layer I am attempting to use track matte on is a draft 3d comp layer. It works fine if I do not have draft 3d, but I need it on for the orientation adjustments.