Fix alpha parameter in hair material.

mmp / pbrt-v3

Source code for pbrt, the renderer described in the third edition of "Physically Based Rendering: From Theory To Implementation", by Matt Pharr, Wenzel Jakob, and Greg Humphreys.

http://pbrt.org

BSD 2-Clause "Simplified" License

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Fix alpha parameter in hair material. #189

Closed kiwaiii closed 6 years ago

kiwaiii commented 6 years ago

Fix double radians conversion, reducing the effect of the alpha parameter on hair appearance