Question by Mister-Mortal · May 02, 2017 at 09:00 AM · shader vr shaders image effects

Problem with Image Effect shader for Virtual Reality

Hey guys,

Been trying to implement hologram effect into my VR game. My solution is pretty straightforward: camera that mimics movement of players camera captures stuff into Render Texture -> Render texture is passed to Image Effect shader -> Image effect writes on top of Main Texture (player's view).

For render texture resolution I'm using 1080x1200 (resolution for one eye for HTC Vive).

Here's the result (GIF): http://imgur.com/a/2jGwq

The grayscale overlay (Image Effect) is displaced for both the right and left eyes. Here's an example from frame debugger (I photoshoped images together, I'm using multi-pass rendering stereo rendering, so the images are being rendered one after another, not in a single pass): alt text

Here's a basic fragment method I'm using:

 fixed4 frag (v2f i, UNITY_VPOS_TYPE screenPos : VPOS) : SV_Target
 {
     fixed4 col = tex2D(_MainTex, i.uv);
     float4 holoCol = tex2D(_HoloTex, i.uv);

     float brightness = (0.2126*holoCol.r + 0.7152*holoCol.g + 0.0722*holoCol.b);

     return lerp(col, float4(brightness, brightness, brightness, 1), 0.5);
 }

Any help is highly appreciated! Cheers!

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