Where do these black stripes come from on this texture? I'm fiddling a bit with SteamVR Workshop to recreate the atic. I've modeled the top of a desk and I wanted to give it proper coloring. So I used a texture. This is the first texture I have ever created, so this might be a noob question. It seems not all colors are in the right spot.

This is the model in blender


This is how the texture is put together



And this is how it is rendered in the VR world


Where could these black faded spots come from?

Or maybe it is not entirely fair to ask it in blender.stackexchange.com, as in blender, all looks fine. But, since I have such little experience with texturing, maybe I did something wrong?
Your mesh seems to be quite rough. Try remeshing the corners where this effect appears (avoid triangles) and then put a subsurf on the object.

Those faded spots appear if smooth shading is applied onto edges with a big angle of the two touching faces.