I'm not sure what you mean by standard 3d files. Only files that I have are text files full of code similar to C. Pov-Ray is only program that can render the picture that is defined in those files.
POV-Rays site has many converters to change between different formats - easy one is morey since it uses POV-ray for its rendering. I perfer POV-ray better myself because its easier for me to work with transformed simple shapes, and for the CSG the the others don't use.