There is currently a proposal on Area 51 for a general 3D non-programming stack exchange, including questions about 3DS Max. As of this writing it is in the "commitment" phase, so not usable yet. It needs more committers before it can move into beta.
Update: The above proposal expired. After spending a year in a particular stage, Area 51 automatically closes a proposal, but they do so with a nice message explaining that some of the most successful Stack Exchange sites have come from stalled proposals that were closed and restarted from scratch.
So, follow the new 3D Modeling and Animation proposal, and add some good sample questions to it, or just vote on the questions there. The proposed site has potential benefits even users of this site, since it will cover questions about getting Blender assets in and out of other tools like Substance Painter, Marmoset Toolbag, and other rendering packages and engines. What happens if an artist exports a model from Blender into Unity 3D and it doesn't look right, and Unity settings need to be tweaked? You shouldn't ask here about Unity settings. That's why the new proposal is needed.