Standard Shader, SetTextureOffset / SetTextureScale for emission only

Unity Engine
1

Hey,

I wanted to animate my emission using offset.
But it seems like standard shader only use _MainTex scale/offset instead of their own.
This makes it impossible to animate only emission for me.

I am new to all this multi_compile and shader_feature things.
Just wanted to do the thing that worked all time long.

Would be nice, if someone could help me.

2

Just sample your emissive with new UVs. You can either specify these in a vertex program or just manipulate _MainTex’s UVs

Shader "Custom/NewShader" {
    Properties {
        _Color ("Color", Color) = (1,1,1,1)
        _MainTex ("Albedo (RGB)", 2D) = "white" {}

//add your props for adjusting UVs
        _EmissiveXOffset("Emissive X Offset", Float) = 0.0
        _EmissiveYOffset("Emissive Y Offset", Float) = 0.0
        _EmissiveTiling("Emissive Tiling", Float) = 1.0
}

....rest of shader here....

void surf (Input IN, inout SurfaceOutputStandard o) {
          
            fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
            o.Albedo = c.rgb;
           
//more efficient to setup UV's in vertex program but you get the idea
            float2 emissiveUV = float2(IN.uv_MainTex.x + EmissiveXOffset, IN.uv_MainTex.y + EmissiveYOffset) * _EmissiveTiling;
            fixed4 e = tex2D(_MainTex, emissiveUV);
            o.Emission = e.rgb;
1 Like
3

Sory, as said, I am using the standard shader. I don’t want to recode all needed features.
Just wanted to animate the emission while keeping all the other features in place.

4

There’s no way to do that without a custom shader. The existing one is not designed for it, so, if that’s what you want to do, you need to have a custom shader, either a modified standard shader (very difficult) or a surface shader that matches a majority of the standard shader features (simpler, as posted above).