Just got this working today and it’s super sweet for simple, unlit, textured, colored, prototypes. For anyone who wants a simple, unlit, color, with blending modes, here it is! I honestly wish that Unity had this as a default, I hate having to try a bunch of shaders for something simple like this. So for anyone sharing my pain, here it is! Enjoy!! (side note: divide is pointless but once you look at the code, it’s easy).
ADD COLOR
MULTIPLY COLOR
SUBTRACT COLOR
Shader "Unlit/ColorBlend"
{
Properties
{
_Color ("Main Color", Color) = (1,1,1,1)
[Enum(None,0,Add,1,Multiply,2, Subtract,3)] _Blend ("Blend mode subset", Int) = 0
_MainTex ("Texture", 2D) = "white" {}
}
SubShader
{
Tags { "RenderType"="Opaque" }
LOD 100
Color [_Color]
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
// make fog work
#pragma multi_compile_fog
#include "UnityCG.cginc"
struct appdata
{
float4 vertex : POSITION;
float2 uv : TEXCOORD0;
};
struct v2f
{
float2 uv : TEXCOORD0;
UNITY_FOG_COORDS(1)
float4 vertex : SV_POSITION;
};
sampler2D _MainTex;
float4 _MainTex_ST;
float4 _Color;
float _Blend;
v2f vert (appdata v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
o.uv = TRANSFORM_TEX(v.uv, _MainTex);
UNITY_TRANSFER_FOG(o,o.vertex);
return o;
}
fixed4 frag (v2f i) : SV_Target
{
// sample the texture
fixed4 col = tex2D(_MainTex, i.uv);
switch(_Blend){
case 1:
col = tex2D(_MainTex, i.uv) + _Color;
return col;
case 2:
col = tex2D(_MainTex, i.uv) * _Color;
return col;
case 3:
col = tex2D(_MainTex, i.uv) - _Color;
return col;
}
// apply fog
UNITY_APPLY_FOG(i.fogCoord, col);
return col;
}
ENDCG
}
}
}