I found it a bit hard for me to understand this slide. Where does the light come from in this slide? Is the light following the d\omega direction (that the surface is giving out light), or is the light opposite to the d\omega direction (that the surface is receiving light)? And why does the cos\theta part in the denominator, rather than in the numerator part of the fraction?
jasonx
Isn't the difference in surface orientation sort of what Lambert's Law also accounts for?
I found it a bit hard for me to understand this slide. Where does the light come from in this slide? Is the light following the d\omega direction (that the surface is giving out light), or is the light opposite to the d\omega direction (that the surface is receiving light)? And why does the cos\theta part in the denominator, rather than in the numerator part of the fraction?
Isn't the difference in surface orientation sort of what Lambert's Law also accounts for?