How to Access unity shader Properties in script?

Question

I want to access two properties _Color and _Color2 and want to change the values using script as we can see the value is in the format (1,1,1,1) so how can I change it its basically color values.

Shader "Custom/SpriteGradient" 
{
    Properties
    {
        [PerRendererData] _MainTex("Sprite Texture", 2D) = "white" {}
        _Color("LeftColor", Color) = (1,1,1,1)
        _Color2("RightColor", Color) = (1,1,1,1)
        _Scale("Scale", Float) = 1

        _StencilComp("Stencil Comparison", Float) = 8
        _Stencil("Stencil ID", Float) = 0
        _StencilOp("Stencil Operation", Float) = 0
        _StencilWriteMask("Stencil Write Mask", Float) = 255
        _StencilReadMask("Stencil Read Mask", Float) = 255
        _ColorMask("Color Mask", Float) = 15
        // see for example
        // http://answers.unity3d.com/questions/980924/ui-mask-with-shader.html
    }

    ...
}

Does this answer your question? Dynamically change property of Shader — Everts
– Everts, Commented Jan 31, 2020 at 19:23

derHugo · Accepted Answer · 2023-02-01 18:58:39Z

2

See Material.SetColor

Modified example from the API

void Start()
{
    //Get the Renderer component from this object
    var renderer = GetComponent<Renderer>();

    var material = renderer.material;

    //Call SetColor using the shader property name "_Color" and "_Color2" and setting their color to red
    material.SetColor("_Color", Color.red);
    material.SetColor("_Color2", new Color(1, 0, 0, 1));  
}

The name means the actual property name, not the display name. You also can get the actual property names e.g. by selecting a shader asset and check the inspector

edited Feb 1, 2023 at 18:58

answered Jan 31, 2020 at 12:53

derHugo

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