Need help, vertex alpha texture blend with vertex colours

Unity Engine
1

Hi,

Im trying to make a simple shader that blends 2 textures based on the vertex alpha BUT also has the RGB of the vertex colour multiplied into both textures,
im an artist not a coder so I have found an example of how to blend the 2 textures using the vertex alpha component and I added the vertex colour to the first texture but i cant seem to get the vertex colours multiplied into the 2nd texturemap no matter what i try, i either get the vertex colours but no alpha blend or the alpha blend and no colours :frowning:

Im sure its super simple to do if you know what your doing but i dont lol :slight_smile:

this is what i have just now

Shader "John/TextureBlendVTXColour" {

Properties {
	_MainTex ("Texture 1 (white vertex A)", 2D) = ""
	_Texture2 ("Texture 2  (black vertex A) ", 2D) = ""
}

SubShader {
	BindChannels {
		Bind "vertex", vertex
		Bind "color", color
		Bind "texcoord", texcoord
	}
	
	Pass {

		SetTexture [_MainTex]	{Combine primary * texture} 
		SetTexture [_Texture2]  {Combine previous Lerp(primary) texture}
	}
}

}

this blends 2 textures but only the first texture has the vertex colours multiplied into the texture, any help would be fantastic.

2

You should be able to do it with just one more texture operation:

	SetTexture [_Texture2]  {
		Combine previous * primary, previous
	}

Note that the comma allows you to apply different operators to the RGB and A channels. In this case we leave the alpha channel alone, but multiply the result of the previous operation by the vertex colour. Texture 2 is not actually used again.

3

AWESOME, cheers dude thats perfect.I was not using the comma so thats good to know :smile: