https://bugs.winehq.org/show_bug.cgi?id=39253
--- Comment #8 from Béla Gyebrószki gyebro69@gmail.com --- (In reply to Józef Kucia from comment #7)
Created attachment 56810 [details] Hack
The game seems to indeed require DXTn volume textures.
The patch works as expected.
OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: GeForce GT 730/PCIe/SSE2 OpenGL core profile version string: 4.5.0 NVIDIA 375.26