On Linux version, when you go inside the gut. Performance grinds to a halt and fps is really bad. Outside though performance is great.
It's probably Unity's HLSL->GLSL transpiler at it again... That tool is, well, let's not talk about it, otherwise I won't stop ranting.I've found that the game is running fine if using Vulkan instead of OpenGL.So, try launching it with the "-force-vulkan" command line parameter.
This fixed it. Thanks a lot! :D