Sprite Shader not working in build, but working in Editor

Hi, I have a problem with my Sprite shaders in Unity 2017.4. In the Editor they work just fine (both in scene and game view). But when I run the build it freezes after the splashscreens.

I am using tex2Dlod() not tex2D(), because tex2D() cannot be used in a loop with varying number of cycles. I know it does not figure out the mip-map like the tex2D() but in my case I do not care about mip-maps.

What might be the problem?

* I also tried making the for loops not with varying number of cycles (I hardcoded the step variable) and in that case the build no longer freezed but all sprites using this shader were still not draw on the screen.

** The shader uses a simple blur algorithm for achieving in-game blur (I have already tried with pre-baked blur and at this stage the project needs real-time sprite blurring, so baking blur is not an option. Also depth-of-field is not an option as well, because most of the in-game graphics have transparent pixels)



This is the relevant part of the shader code:

Code (CSharp):

1. fixed4 SampleSpriteTextureBlurred (float2 uv)
2. {
3.     fixed4 color = tex2Dlod (_MainTex, float4(uv,0,0));
4.  
5. #if ETC1_EXTERNAL_ALPHA
6.     fixed4 alpha = tex2Dlod (_AlphaTex, float4(uv,0,0));
7.     color.a = lerp (color.a, alpha.r, _EnableExternalAlpha);
8. #endif
9.  
10.     return color;
11. }
12. fixed4 CalculateBlurredColor(float2 texCoordXY, float worldPosZ){  
13.     _ApertureSize = abs(_ApertureSize);
14.     float worldPosNorm = _BlurStrength* _ApertureSize*sqrt((1/_ApertureSize)*abs(worldPosZ-_NoBlurZ));
15.    
16.    
17.     float _Size = worldPosNorm * 3 * when_lt(worldPosZ, 0) + worldPosNorm * 0.7 * when_gt(worldPosZ, 0) ;
18.              
19.        
20.     fixed4 sum = fixed4(0,0,0,0);
21.     int counter = 0;
22.     if(_Size == 0){
23.         sum += SampleSpriteTexture(texCoordXY)  ;
24.         counter++;
25.     }else{
26.         float step = abs(1 / _Size);  
27.         for(float y = -1;y<=1;y+=step){
28.             for(float x = -1;x<=1;x+=step){
29.                     sum += SampleSpriteTextureBlurred(texCoordXY + float2(x * ( _MainTex_TexelSize.x * _Size), y * (_MainTex_TexelSize.y * _Size) ) )  ;
30.                     counter++;
31.             }
32.         }
33.     }
34.     sum = sum / counter;
35.     return sum;
36. }

 

I don't understand shaders, but it's included in build?

 

Do you dynamically add this shader on runtime or is it fixed?

 

What build you are speaking about? Mobile device? How big is your texture? Any chance your texture is bigger than 2048x2048 for device that support only max. 2048x2048?

 

The build is for PC and the graphics are in different sized, but less than 2048

 

No, the problem is not with the shader loading, but with this specific shader code.