Applying a color combine with an alpha texture opens up some interesting possibilities, because you can control the opacity of the texture by modifying the color multiplier's alpha value. Below is a picture of the default Unity Unlit Transparent shader, and on the right are 2 examples of my modified colored unlit transparent shader. The opaque section of the object on the top right is semi-transparent because I set the color multiplier's alpha value to 50%(0.5), which the object on the bottom left is full opacity but has a red tint applied.
The shader itself is pretty simple, I modified Unity's Unlit-Alpha shader to support a Color property and handle the color combine operation. The shader will appear in the shader dropdown menu under NAKAI/Unlit/Transparent Colored. In case you're wondering, the Unlit-Alpha shader was written using Unity's ShaderLab Shader Syntax, I highly recommend reading up on the operations involved. As before, you are free to copy and use this shader as you wish, Enjoy!
// Copied from Unlit-Alpha.shader, but adds color combine(tinting)
// Unlit alpha-blended shader.
// - no lighting
// - no lightmap support
// - Added per-material color
// Change this string to move shader to new location
Shader "NAKAI/Unlit/Transparent Colored" {
Properties {
// Adds Color field we can modify
_Color ("Main Color", Color) = (1,1,1,1)
_MainTex ("Base (RGB)", 2D) = "white" {}
}
SubShader {
Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
LOD 100
ZWrite Off
Blend SrcAlpha OneMinusSrcAlpha
Pass {
Lighting Off
SetTexture [_MainTex] {
// Sets _Color as the 'constant' variable
constantColor[_Color]
// Multiplies color (in constant) with texture
combine constant * texture
}
}
}
}
