Apply shader to a sprite.

Questions & Answers
1

Is it possible to apply shader to a unity4.3 sprite somehow?
Want to make some basic color correction.

3

I was finally able to use my own shader with a SpriteRenderer. Here what I did,

I created a new shader (i.e. called TextureBlend), then I edited the shader to have:

Shader "2D/Texture Blend"
{  
    Properties
    {
       _MainTex ("Sprite Texture", 2D) = "white" {}
       _Color ("Alpha Color Key", Color) = (0,0,0,1)
    }
    SubShader
    {
        Tags 
        { 
            "RenderType" = "Opaque" 
            "Queue" = "Transparent+1" 
        }

        Pass
        {
            ZWrite Off
            Blend SrcAlpha OneMinusSrcAlpha 
 
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #pragma multi_compile DUMMY PIXELSNAP_ON
 
            sampler2D _MainTex;
            float4 _Color;

            struct Vertex
            {
                float4 vertex : POSITION;
                float2 uv_MainTex : TEXCOORD0;
                float2 uv2 : TEXCOORD1;
            };
    
            struct Fragment
            {
                float4 vertex : POSITION;
                float2 uv_MainTex : TEXCOORD0;
                float2 uv2 : TEXCOORD1;
            };
 
            Fragment vert(Vertex v)
            {
                Fragment o;
    
                o.vertex = mul(UNITY_MATRIX_MVP, v.vertex);
                o.uv_MainTex = v.uv_MainTex;
                o.uv2 = v.uv2;
    
                return o;
            }
                                                    
            float4 frag(Fragment IN) : COLOR
            {
                float4 o = float4(1, 0, 0, 0.2);

                half4 c = tex2D (_MainTex, IN.uv_MainTex);
                o.rgb = c.rgb;
                if(c.r == _Color.r && c.g == _Color.g && c.b == _Color.b)
                {
                    o.a = 0;
                }
                else
                {
                    o.a = 1;
                }
                    
                return o;
            }

            ENDCG
        }
    }
}

Then I created a new Material (i.e. called OverlayMaterial) and attached the above shader to it.

Finally on the SpriteRenderer component I selected the OverlayMaterial for the Material attribute.

The important part that did make it work for me was to set the tags such as

Tags 
{ 
    "RenderType" = "Opaque"
    "Queue" = "Transparent+1" 
}

And by defining the vert program input as

    struct Vertex
    {
        float4 vertex : POSITION;
        float2 uv_MainTex : TEXCOORD0;
        float2 uv2 : TEXCOORD1;
    };

After that I was able to apply the effect I wanted. Here a shot of the result for the sprite renderer component [21486-sprite+renderer+custom+material.jpg|21486]

2

See this link:

I haven’t tried this myself, but look down at the shaders that can be replaced. Maybe you can use Camera.SetReplacementShader(). This functionality may not be built in for 2D sprites yet though.

4

This is my solution - a lot simpler and more straight forward :

  • create a material

  • add your sprite to the material ( you can change this later from the sprite itself )

  • add the shader to the material

  • in the sprite properties, drag in the shader.

  • List item

That should do it :slight_smile: .