If you make the 3d model yourself and people can download it as a 3d model then it goes in 3d models but if its a 2d render then it doesn't belong in the 3d category. Thats how I see it but upload it to wherever you feel more comfortable. You could also put pngs in the photoshop application category as well. So really its about where you think people will see it the most and I think thats in the stock area, which really is what it is. I hope your english is good enough to understand me because that all sounds a bit twisted to me
intéressant ...there is no category "PNG" ... or "PNG or PSD TUBE" ... I thought "3D models" was for 3D png or 3D psd ... I am what I created in 3D here:[link]
thanks so much for it's use!!
Tabz
[link]
here is the link to the psd category [link]