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By Design
Votes
0
Found in
5.5.4f1
Issue ID
1081027
Regression
No
CommandBuffer.GetTemporaryRT with custom size is incorrect when rendering path is set to Forward
Steps to reproduce:
1. Open attached project
2. Open "_BlurryRefraction" scene
3. Make sure Main Camera rendering path is set to "Forward"
4. Go into play mode
-Wall (_RefractiveGlass object) is not transparent
Expected result: "_RefractiveGlass" object should be transparent
Note: Enabling "Allow HDR" fixes the issue
Reproduced on: 2017.4.11f1, 2018.2.8f1, 2018.3.0b2, 2019.1.0a1
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Resolution Note:
When HDR is not on, the CameraTarget points to a null texture. So the TemporaryRT cannot get the size of the "screen". When HDR is on, an intermediate texture is created in the pipeline where CameraTarget has a texture.
So to workaround, either use cam.pixelWidth, cam.pixelHeight instead of -2,-2
or
have this in the script:
void OnRenderImage(RenderTexture src, RenderTexture dst)
{
Graphics.Blit(src,dst);
}