Specular Angle Map

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Hi!

I'm studying houdini shader system and I have difficulties with control specular angle by a texture map.

I want to achieve a sort of dirty chrome effect where specular angle is controlled by a texture map instead of a single float channel.

As you can see on the attached picture I tried to multiply the default specular angle controller by a black&white texture map but this approach didn't work for me.

I would appreciate if somebody could help me.

Attachments:
specAngleMap.jpg (36.5 KB)

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