Iluminance and Intensity

OpenGL OpenGL: Basic Coding
1

What is the diference between GL_ILUMINANCE and GL_INTENSITY in glTexImage* function?

2

one difference is with modulating
GL_LUMINANCE C=CfLt A=Af
GL_INTENSITY C=CfIt A=AfAt
thus the alpha calculations are different (colour is the same though)

3

OK, I undestand that, but what is Lt and It in that equation.

What is LUMINANCE and what is INTENSITY?

[This message has been edited by Boresight (edited 06-25-2001).]

4

Texture Environments and Texture Functions