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Specular Weight

6 REPLIES 6
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Message 1 of 7
Joseph_Kim
542 Views, 6 Replies

Specular Weight

By setting your Specular Weight to anything less than value of 1 on standardSurface , does this break PBR??

What I am trying to achieve is to decrease the value of highlight on an object and I tried that with trying to set my roughness to 1 with no success.

Thanks for your help.

6 REPLIES 6
Message 2 of 7
lee_griggs
in reply to: Joseph_Kim

Specular weight affects the brightness of the specular highlight, however, a lower amount of light should be reflected when using high roughness values.

What shading effect are you trying to achieve?

More information here:

Specularity BRDF

Understanding Physically Based Rendering in Arnold.

Lee Griggs
Arnold rendering specialist
AUTODESK
Message 3 of 7
Joseph_Kim
in reply to: Joseph_Kim

Hi Lee,

I have specular roughness set to 1 and light reflected is still to high. What is the correct way to decrease the light being reflected?

Joe

Message 4 of 7
lee_griggs
in reply to: Joseph_Kim

Yes, just reduce the Specular Weight. Why does roughness need to be so high? I never have it fully at 1. Its practically acting like a Lambert shader.

Lee Griggs
Arnold rendering specialist
AUTODESK
Message 5 of 7
lee_griggs
in reply to: Joseph_Kim

You could also reduce Indirect Specular if that is also an issue as well as Clamping and Indirect Specular Blur.

Lee Griggs
Arnold rendering specialist
AUTODESK
Message 6 of 7
Joseph_Kim
in reply to: Joseph_Kim

I put roughness value to one hoping that it would reduce the intensity of the reflected light. What do you think about playing with IOR values?

Thanks!!

Message 7 of 7
lee_griggs
in reply to: Joseph_Kim

Could do, but that is more likely to affect the Fresnel edge.

Lee Griggs
Arnold rendering specialist
AUTODESK

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