Low level graphics and you

After a long time of meditating on OpenGL I've come down with a bad case of "I don't know how to do anything and only use tools made by someone better than me". Since the only cure for this common programmer illness is more meditating I've decided I want to learn graphics on an even lower level than OpenGL, though finding a guide for this route has proven to be nigh impossible.

I'd appreciate it if a guru could give me a friendly pointer in the right direction or an insight on the things that take place between an OpenGL call and a pixel being displayed onscreen.

At the end of my journey I desire the ability of displaying but a single pixel without the aid of instruments given to me by the masters.

>>24
Thanks but I'm not interested in the math. I went through the rasterization article and saw them using this "SetPixel()", that's what I'm interested in. I want to know how are pixels drawn, how graphics libraries implement a "SetPixel()" function, surely they don't use a function provided by windows.
>>25
I'm afraid I can't find the source right at this moment, but according to the literature I've read on this subject, ZBrush is not hardware accelerated and it uses neither Direct3D or OpenGL.