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1) you can upload it how you prefer, I would also provide textures separately as well as packed so they are able to apply these correctly to fbx/obj as they see fit for their software
2) agree that would be a useful feature
3) you can upload a marmoset file if you prefer. Others dont because the models can be ripped/stolen from marmoset viewer.
4) thats very subjective, also probably a lot more work to create a consistent studio environment for every software package on cgtraders behalf (and keep updated) so doubtful that would happen.
As I said, I already upload, and for sure I have never put a wrong number on polygon count, neither at any other box, but if that had the "signature" of the cgtrader, a potential buyer would feel more secure. Also a 3D view is something kinda everywhere, even on Facebook, so as we upload 3D format assets, I guess it's easy to be made
Auto export/conversion to fbx/obj doesnt make sense since you have different export options for different purposes, Y Up, Z Forward, Polygroups, Vertex order etc. Some software requires Z Up Y forward instead and this puts the onus on cgtrader which they would prefer on you. Mind you I do like your ideas just trying to be realistic. I think there are so many bugs that need fixing first which dont ever seem to get fixed this would be my priority before adding new features that potentially break things - looking at you new TS Publisher, for those in the know.
