Ideas for Cycles Shaders

[pixelgrip]

@Stuntkoala

Although Fresnel Roughness also has to be taken into account.

You mean for a Fresnel falloff curve if the roughness is high? Yes i have posted a screenshot from a paper,there you can see if the roughness is at around 0.5 micrometer, then the Fresnel curve is allmost flat to a F0 value.

here see the last post

Glossy/rough fresnel

i have found measurements from real metals. at pic a and b,you see the absorptance on a copper surface (at green 532nm) with different roughness values (microns/mikrometer um) plotted,at angles of incident from 0-90. (100-Absorptance=Reflectance) pic a shows 0.01 -0.5 microns,and pic b shows 0.5-2 microns roughness Absorptance curve interesting to see with 0.5- 2 microns the fallofff at 90 is allmost down to F0. [metallfalloff1]