Mat files were provided, but only for Poser 5. Quote from the readme file. "The Textures, Morph Injection are also compatible with plain Poser 4 and Poser 4 with Pro Pack. With Poser 4 you will have to manually convert the .jpg Bump maps to .bum format. The MAT Poses only works with Poser 5 (Sorry folks I am not a Poser 4 user)" First Product for me, and do I ever feel jipped. Buyer beware I guess. I am learning.