_TexelSize in material not working

Hey there,

I have this very strange problem that unity seems to not create information about the texturesize of material properties.

Here one example shader (Unlit with just a nonsense multiplication with TexelSize):

Code (CSharp):

1. Shader "Unlit/TexelTest"
2. {
3.     Properties
4.     {
5.         _MainTex ("Texture", 2D) = "white" {}
6.     }
7.     SubShader
8.     {
9.         Tags { "RenderType"="Opaque" }
10.         LOD 100
11.  
12.         Pass
13.         {
14.             CGPROGRAM
15.             #pragma vertex vert
16.             #pragma fragment frag
17.             // make fog work
18.             #pragma multi_compile_fog
19.            
20.             #include "UnityCG.cginc"
21.  
22.             struct appdata
23.             {
24.                 float4 vertex : POSITION;
25.                 float2 uv : TEXCOORD0;
26.             };
27.  
28.             struct v2f
29.             {
30.                 float2 uv : TEXCOORD0;
31.                 UNITY_FOG_COORDS(1)
32.                 float4 vertex : SV_POSITION;
33.             };
34.  
35.             sampler2D _MainTex;
36.             float4 _MainTex_ST;
37.            
38.             v2f vert (appdata v)
39.             {
40.                 v2f o;
41.                 o.vertex = UnityObjectToClipPos(v.vertex);
42.                 o.uv = TRANSFORM_TEX(v.uv, _MainTex);
43.                 UNITY_TRANSFER_FOG(o,o.vertex);
44.                 return o;
45.             }
46.            
47.             fixed4 frag (v2f i) : SV_Target
48.             {
49.                 // sample the texture
50.                 fixed4 col = tex2D(_MainTex, i.uv) * _MainTex_TexelSize.x;
51.                 // apply fog
52.                 UNITY_APPLY_FOG(i.fogCoord, col);
53.                 return col;
54.             }
55.             ENDCG
56.         }
57.     }
58. }
59.  

I'm getting the error :
undeclared identifier '_MainTex_TexelSize'
Compiling Vertex program
Platform defines: UNITY_NO_DXT5nm UNITY_USE_DITHER_MASK_FOR_ALPHABLENDED_SHADOWS UNITY_PBS_USE_BRDF1 UNITY_SPECCUBE_BOX_PROJECTION UNITY_SPECCUBE_BLENDING UNITY_ENABLE_DETAIL_NORMALMAP SHADER_API_DESKTOP

What am I missing? I am using TexelSize in image effects, but I somehow can't get them to work with material textures.
I'm on Unity 5.6.1p4 btw.

 

you need to declare it. Where you have your float4 _MainTex_ST; you should also have half4 _MainTex_TexelSize;

 

Arggghhh, of course. Seems like my brain didn't work that well yesterday. Thanks a lot