Ummm, swarg, why would you need materials to finish the modelling process? And OBJ functions better with Bryce materials than 3DS. And no, imported models' textures don't work with re-exporting. I just tested on my model, with its own image textures. Imported into Bryce, set the textures in Bryce and all textures went out and back in completely black. Plus they were all 256x256, while the original UV mapped texture was 2048x2048. As far as I understand MTL files, this one was fine. Ambience of the materials in OBJ was set to ca. 0.2, diffusion to 1, specularity to zero... BTW, Darlisa, it still says "Exported from Bryce 5.5".

-- erlik