I'll tell you everything in order. First, I created a pen model based on a photo in GDB format, then converted it to DAE format. If I converted to OBJ format right away, then I had problems with the original single texture that was in GLB. This ZIP with DAE inside opens perfectly in SH3D, you just need to move the gloss slider a little bit in the texture setting, just a little bit, the texture immediately appears. Now, if I export this model from the SH3D scene as an OBJ, then this OBJ model and MTL appear on my computer. But she can't go back, SH3D won't let her in, refuses. I thought the reason might be DAE, but I couldn't convert GRB to OBJ, they were all the same color. So I settled on DAE.
