Cars Trying to understand the shader properties

[Johnny Speed]

I saw a post on here that explained what all the shader properties did. I googled for hours and only found this:

"ksAmbient controls the brightness when things are in the shadows.
ksDiffuse controls the brightness when things are lit by the Sun."

But I know I saw a post that went into more detail about the other options and I can't find it. Please, if anyone knows and can link me to the post, or just explain what each option does..? PLEASE? Opening a can of worms, I know. But it is bothering me that I can't find the explanations.