https://bugs.winehq.org/show_bug.cgi?id=39095
--- Comment #9 from Béla Gyebrószki gyebro69@gmail.com --- Still present in Wine 10.0-rc4.
This may actually be a bug in the game because the same problem occurs with DXVK.
Non-Steam demo version is available from the developer: http://www.deadnaut.com/demo/DeadnautDemoWindows.zip
To force using DX9 mode, start the demo with 'Deadnaut.exe -force-d3d9'
OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: NVIDIA GeForce GTX 1660 SUPER/PCIe/SSE2 OpenGL core profile version string: 4.6.0 NVIDIA 565.77