If you are looking for fast and cheap LUT solution Fast LUT is for you. It contains possible one of the fastest postprocess shader, which can fit also mobile and VR game developers needs.
This solution works even 40% faster than lowest setup of default Unity LUT postprocess (check out screens for profiler examples).
Requirements for mobile devices: used shader require at least GLES 3.0, because it uses 3D texture sampling.
Plugin contains additional 5 example LUT textures.
-Unity 2017, 2018, 2019
-Standard Rendering Pipeline
Available at: https://assetstore.unity.com/packages/vfx/shaders/fullscreen-camera-effects/fast-lut-112265