Displacement Image Effect

Incorrect image effect result.
For second camera (it is render normal map to render texture) and material (using render texture in shader) and script on first camera:

Code (CSharp):

1. [ExecuteInEditMode]
2.     [RequireComponent(typeof(Camera))]
3.     public class DisplacementEffect : MonoBehaviour
4.     {
5.         public Material material;
6.         public Shader shader;
7.         private bool support = true;
8.  
9.         void Awake()
10.         {
11.             if (!SystemInfo.supportsImageEffects
12.                 || !SystemInfo.supportsRenderTextures
13.                 || !SystemInfo.SupportsRenderTextureFormat(RenderTextureFormat.RGB565)
14.                 || !shader.isSupported)
15.             {
16.                 support = false;
17.             }
18.         }
19.  
20.         void OnRenderImage(RenderTexture source, RenderTexture destination)
21.         {
22.             if (Time.timeScale == 0 || !support) Graphics.Blit(source, destination);
23.             else Graphics.Blit(source, destination, material);
24.         }
25.     }

Shader:

Code (CSharp):

1. Shader "Hidden/DisplacementEffect"
2. {
3.     Properties
4.     {
5.         _MainTex("Base (RGB)", 2D) = "white" {}
6.         _DisplacementTex("Displacement rt", 2D) = "white" {}
7.         _DisplacementPower("Displacement power", Float) = 0.025
8.     }
9.  
10.     SubShader
11.     {
12.         Pass
13.         {
14.             CGPROGRAM
15.             #pragma vertex vert_img
16.             #pragma fragment frag
17.  
18.             #include "UnityCG.cginc"
19.  
20.             uniform sampler2D _MainTex;
21.             uniform sampler2D _DisplacementTex;
22.             uniform float _DisplacementPower;
23.  
24.             float4 frag(v2f_img i) : COLOR
25.             {
26.                 fixed4 displacementVector = tex2D(_DisplacementTex, i.uv);
27.                 fixed2 uv_distorted = i.uv + _DisplacementPower * displacementVector.xy;
28.  
29.                 return tex2D(_MainTex, uv_distorted);
30.             }
31.             ENDCG
32.         }
33.     }
34. }

Project:


Effect Preview:

It work correctly on a lot of devices, but only PowerVR GPU has this result pixelization like low resolution:

 

do u have any ideas?

 

Using "fixed" for uvs is your problem. Use float like this:

float2 uv_distorted = i.uv + _DisplacementPower * displacementVector.xy;

 

thx for help. It's resolved