I just got a brand new iMac with the GeForce GTX 780M 4GB of VRAM, and I was hoping I could use the Ray-tracing 3D effects. I'm not sure if I am doing something wrong, but the option to switch to GPU is greyed out. I have not installed anything except After Effects since I got the machine, so maybe I need to install CUDA? Where would I go about finding the drivers for that so I could try it.
Thanks,
David Faircloth