A while back, I wanted to improve the material system I was using in my engine at home, since at the time, I had just just one fixed material type. I had to specify three textures for each object I wanted to render: Diffuse, Specular and Normal. If I didn’t want specular, I had to use a black specular texture. This was barely OK for very simple things, but soon I wanted more… I’m not really going to mention anything about the lighting in this article, since that’s still a…