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Combine texture with texture already combained in alpha layer.

Discussion in 'Shaders' started by Darkness-Seeker, Nov 9, 2016.

  1. Darkness-Seeker


    Jun 18, 2016

    Looking around the internet, I found this particular shader that I need to change a little to get it to work as I need, and I need a little help.

    Code (CSharp):
    1. Shader "Custom/Map Borders" ////////// Shader renamed
    2. {
    3.     Properties
    4.     {
    5.         _Color("Mask Color", Color) = (1, 1, 1, 1) ////////// _Color property added to this shader
    6.         _MainTex("Base Texture (RGB)", 2D) = "white" {}
    7.     _Mask("Culling Mask", 2D) = "white" {}
    8.     _Cutoff("Alpha cutoff", Range(0,1)) = 0.1
    9.     }
    10.         SubShader
    11.     {
    12.         Tags{ "Queue" = "Transparent" }
    13.         Cull Off ////////// I added this line to have the both sides of my plane mesh visible
    14.         Lighting Off
    15.         ZWrite Off
    16.         Blend SrcAlpha OneMinusSrcAlpha
    17.         AlphaTest GEqual[_Cutoff]
    18.         Pass
    19.     {
    20.         SetTexture[_Mask]{
    21.         constantColor[_Color]
    22.         Combine texture * constant ////////// The alpha component of the _Color property defines the Culling Mask opacity (depending on the distance between the player and the grid)
    23.     }
    24.         SetTexture[_MainTex]{ combine texture, previous }
    25.     }
    26.     }
    27. }
    With this shader, I get a texture combined with an alpha, like if it was in a Mask Layer in photoshop:

    The thing, is that I need a new MainTex (so the old one could be something like _MaskTex) that can go as a usual standard material, and layered above, this 2 layers of Masked Textures.

    I am sorry if my explanation of what I want is not the best I can write, and less with so little experience touching shader scripts. Any help is appreciated.

    Thanks for the attention.