nobrot opened this issue on Dec 10, 2008 ยท 9 posts
bagginsbill posted Wed, 10 December 2008 at 6:56 PM
The Specular Exponent map is also going to need special handling. A couple nodes will take care of it. There are two issues:
A Phong Specular Exponent is a number much bigger than 1. But an image only stores 0 to 1. So this map uses some math to transform numbers from one range to another to fit in 0 to 1. We have to decode that and reverse it to get back to a Phong exponent.
The resulting value is only appropriate for the Phong node. To use the information on a Specular, Blinn, Glossy, or Anisotropic node, we need a very different representation. For example, a Phong Exponent of 1000 (very sharp reflection) would turn into some very tiny number for Specular Roughness.
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