Hallo PGD'ers.

I have been reading things about effect-files lately and i didn't found any information about FVF formats. Shaders need info like diffuse, specular and texture coords for each vertex.
What if certain FVF data is used in the effect-file, but isn't present in the mesh that is to be rendered with it.

Will the missing data be replaced by zero's or will i get an error?? Are there routines available to find out which FVF attributes a mesh must have, when using that shader??

Thank you.