ArchCG is the best 3D Architectural Visualization CG forum. The place of Architects, Interior designers and art CG artists. You can show off your stunning 2D/3D works here.
Iscribble. net Forum, A Comunity of Artists
Free forum : A forum for graphic artists of all skill level.
A place for artists of all kinds to socialise and enjoy! This is a forum where you can view, submit and rate other members work, and take part in contests all themed around graphics.