I've noticed in our material library, there are not many materials. One might look and decide that there are plenty but in reality, there aren't many compared to the amount available for many rendering programs. I know many of you have created your own materials and they look stunning. I just think of the brushed metal materials, we have 3. Two don't look like I want them to and one doesn't work for my model in blendigo (the shader one, weird geometry artifacts). I could tweak them to my liking but I don't know how the original authors would feel if I re-uploaded them as a different material. But there is room for TONS of new brushed materials and yet there are only 3.
So my question is just wondering why people don't upload more of their materials? Just curious to what you people think.
I have thought of these (valid :p) reasons so far:
1) Copyrighted textures, etc.
2) You put too much hard work into it to just give it out.
3) It is property of the company you work for.
4) You don't think it is refined enough
5) There is one similar enough.
I'm still learning when it comes to materials but I hope someday I'll make one that will be worthy of the material database (haven't made any so far

).