Turn hand painted dirt Base Color layer to Roughness

I would like to make the dirt layer I painted on, effect roughness. Though im not to sure how to isolate the the alpha. Like I want to effect just the dirt roughness not everything. The normal seems to work pretty good just plugged straight into height, such as what was done with the long-board..... I THINK I GOT IT! Run the texture layer through a Color Ramp with one pole having 0 alpha. Could maybe be better refined with control but im happy with it. Slowly becoming more node competent :p. Could of maybe painted on as linear black/white map(roughness perchance?) and ran through color mix rgb to give it 2 color blends

  • Hayden Brown(Bonkerz) replied

    cycle-exercise_3.png

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  • Jonathan Lampel replied

    Nice progress! Yeah, running the base color through a color ramp (or map range) node is exactly how I would use it for the roughness texture as well 👍 

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