imageworks/OpenShadingLanguage — pull request #79 by lgritz (2011-10-13 23:13:09+00:00)
Title: Review: blackbody: Clamp sub-Draper temp emission at very very dim red, not black

blackbody: Clamp sub-Draper temp emission at very very dim red, not black. This is helpful for people who are normalizing blackbody by dividing by the luminance.