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[Linux] [Post Processing] Shader error in 'Hidden/WorldPositionTint' when launching the project with OpenGL

Package: PostProcessing


How to reproduce:
1. Open the user's attached project (
2. If there are no errors in console, enter Play mode

Expected results: Shaders work correctly, no errors in console
Actual results: Error in console regarding a shader error:
"Shader error in 'Hidden/WorldPositionTint': undeclared identifier 'sampler_CameraDepthTexture' at line 17 (on glcore)"

Reproducible with: PostProcessing 2.2.2 (2018.4.15f1, 2019.2.18f1, 2019.3.0f5, 2020.1.0a19)
Could not test on 2017.4 (no package manager)

- The project on Vulkan does not have this error (launch the project with -force-vulkan to see)

  1. Resolution Note:

    the compilation is due to the fact that custom shader provided is using SampleLevel directly and not the macros provided. and OpenGL doesnot support SamplerStates.

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