@Matt_H:
To use the CyberVision64/3D with Warp3D you must make sure that you have 15-bit screenmodes activated (the environment variable CyberGraphX/HIDE15BIT is "0"). If not, Warp3D-applications wont be able to find any screenmode(s) to use. This also means that if you are to run a windowed Warp3D-application on your Workbench you have to use a 15-bit screenmode. This as it seems the Virge-chip on the CyberVision64/3D only does 3D on 15-bit screens as zipper said.
/Patrik