ok...i modeled this OBJ grenade in C4D R8.2....then assigned the material groups in UV mapper...then take into Carrara 2.1 for shaders and rendering....then the problem---> in UV mapper i grouped 3 material groups. 1. the body called "Body" 2. the pin called "Pin" 3. the top end called "Head" then i group all vertices/facets and assigned all to one group called "Grenade" when i take this OBJ file into Poser 5 theres no problem...i can change the texture of each of the three material groups. But when i take it into Carrara there is only one material group....so when i apply say the color green to the body, it also ends up coloring the pin and head. what am i doing wrong? please help.. thanks for any tips. BT