What I want is assign the black color as an alpha or transparent, then the red color as a normal shader. I'm using EEVEE.
My render result:
1 Answer
Oh my actually it's simple, I use wrong shader. It should be principled BSDF, not emission. So what actually to do is:
- Set black color of color ramp to alpha. Decrease alpha value to zero should work
- Color output of color ramp must be connected to color of Principled BSDF, and alpha output to alpha input.