I have downloaded the FPS tutorial off the unity website (http://unity3d.com/support/resources/tutorials/fpstutorial) and followed the instructions. But when I import the main level mesh or anything else into the editor, only half or nothing at all is there, with no textures. There is also a "Maya not found" error. The first person controller also falls through the mesh on starting the game.
Is there any way around this? Help please!
The "Maya not found" error is shown because you dont have Maya installed.
it should however, not result in the mesh not being shown in the viewport, as i can see c4d meshes fine without having c4d installed.
what can you do is get a hold of a version of Autodesk Maya, or send the meshes to a friend who have, and have him convert them into .OBJ files, that should solve the issues.
in case im wrong in the above answer, then you might want to re-download the tutorial, the error seems kinda odd indeed :)
hope it helps