I'm very new to Photoshop 3D. I have downloaded a few models that I would like to experiment with before moving them into After Effects. However the files wont open, and when I go to the 3D drop down menu, everything is greyed out?
What version of Photoshop are you using?
Does your OS and video card meet the minimum requirements for using 3D in Photoshop?
You may want to check Help -> System Info to see what Photoshop knows about your video card.