I took a few meshes and armatures, and placed it in a group. Then I opened a new blend and linked the group. Now all materials are gray, and it looks black on rendering.
I tried to add a proxy, and that works for animating the armature, but there is still no material.
Why is that? When I tried the same thing with a simple red box, it works. However I can see the materials used in the linked file when I look at materials for another object. However if I try to use them on the default cube, it doesn't seem to work.
Any help appreciated!