As of this moment in time, .obj is a standard able to be read by most applications (with some differences in detail). Picture textures can be used by almost all applications. Proceedural textures do not yet have a standardized form and language; with some exceptions, proceedurals must be treated as specialized to the application that wrote them. It is not surprising that heavy use of P5 proceedurals and methods, and P5/P6 file compressions, is not readily importable into other applications.