With dozens upon dozens of groups now popping up all over DeviantArt, it can be a bit hard to wade through and find relevant ones. Here's a list of groups which provide resources 3D artists can use, organized by type of resource. Hopefully some of these may be useful and save some search time!
3D Specific Resources
These groups specifically cater to 3D artists.
#ModelSheetCentral (https://www.deviantart.com/modelsheetcentral)
While relatively new on the scene, this is a great group for 3D modelers to practice from. The group contains model sheets and concept art which is all available under some sort of free use license. Some amazing 2D concept artists have submitted work which m