I am not at all of specialist of that subject. But I think even for free stuff, we would mention the authors of objects, materials, textures,atmospheres,... if we have forgotten the author we should mention "I can't remember..." . Maybe it's not the official rule, but is an "honour" rule. It's very difficult to make comments on a picture if we don't know exactly what work has done the author : - modeling - texturing - composition The comment should depend on the work which has been done. If the artist has "only" imported some poser in Vue , it's not the same as if he has modeled the character before. I think the author of the free stuff, seeing his/her name on lot of images in credits, can be proud of his/her work; that's an important point we should not forget. ;=) Yves