The layer_rgba shader can be used to mix textures and has an option to blend the alpha.
Thank you very much, but I want use black and white image to show the logo. And as we all know the white means protrude ,the white means concavity. Then I want the logo is gold. So this logic may First use black and white image to control the alpha ,Then use stander surface to control the white region looks like gold. This box may can show you the effect.2.jpg
mix_shader?
https://docs.arnoldrenderer.com/display/A5AFCUG/Mix+Shader
Thank you very much, but I want use black and white image to show the logo. And as we all know the white means protrude ,the white means concavity. Then I want the logo is gold. So this logic may First use black and white image to control the alpha ,Then use stander surface to control the white region looks like gold. This box may can show you the effect2.jpg