how can i modify this shader for transparency?

Question

i would like to modify the following shader to support an alpha channel

  Shader "Unlit/simpleshader"
  {
  
      Properties{
          _MainTex("Texture", 2D) = "white" {}
      }
          SubShader{
          Tags{ "Queue" = "Geometry" }
          Pass{
              BindChannels{
                  Bind "Color", color
                  Bind "Vertex", vertex
                  Bind "TexCoord", texcoord
              }
              SetTexture[_MainTex]{
                  Combine texture * primary
              }
          }
      }
  }

currently i am using it to display rgb points on a mesh, but the alpha channel does not work.

thanks

Answer 1

Best Answer

Answer by Zarenityx · Jul 18, 2018 at 01:01 AM

What you're looking for is Blending. You'll probably want either

 Blend SrcAlpha OneMinusSrcAlpha

or

 Blend One One

although there are a number of blending options.

Also: I wouldn't recommend using the fixed function pipeline. I don't know exactly what hardware you are targeting, but I can almost guarantee that using fixed-function won't be faster. A lot of modern hardware (and really anything in the past decade) will be using a vert/frag shader program internally anyway. Unless you are targeting some archaic platform, you'll be better off writing some HLSL.

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rustyruss1985 · Jul 18, 2018 at 04:37 AM 0

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thanks, it works.

now, i have another problem: https://answers.unity.com/questions/1530600/how-to-quickly-disable-vertices-from-rendering-in.html

i want to quickly turn rendering on/off on specific vertices in a mesh. do you know how to do this?

how can i modify this shader for transparency?

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