CompuServe Messages

I have some questions about UV, too. I've been researching how InterChange might best move UV coordinates between 3D packages. So far, I've classified 3D programs into the following categories: 1. No UV coordinates or texture mapping. 2. Implicit UV coordinates, where the calculation of UV for each vertex is performed at render time based on the type of mapping in the object, and UV info is not stored in the file format and is not editable. For example, LightWave and Imagine work this way. 3. Explicit UV coordinates, where the program precalculates the UV coordinates for each vertex when the user sets the mapping type (cylindrical, spherical, etc.) and where those UV coordinates are stored in the file format. 3D Studio fits in this category. However, as I understand it, there is no user interface in 3DS for adjusting actual UV values per-point. If this was present, it would allow a type of texture "pinning" where the user would say, I want the center of this bitmapped eye's pupil to be centered on this point. 4. Explicit UV as above, with user control of UV. Wavefront and Alias allow this, where you can parametrically adjust a set of UV values across an object, allowing shifts of the UV values en masse, shifting and puckering the texture map. An IPAS or a script can change the UV values in a 3D file, right? What happens when you do this? Does the renderer glitch at all?