cosine lobe sampling PDF

[raider]

Hi Josh,
you simply taking wrong integral. Your PDF have to normalize to one over hemisphere.
You are right saying that

int1.png (4.28 KiB) Viewed 4465 times

but the integral you need have to be this one:

int2.png (23.09 KiB) Viewed 4465 times

[josh247]

I hadn't realised there had been anymore responses to this thread. That answered my question completely and you were right in thinking that my original results were incorrect. Cheers for the help guys.