Okay, tested with dx9 & dxvk
I don’t see any lighting issue, neither on my character …
… or on the ground texture, and char shadow 
@Onevia Is that the ugliness you had ? Should that be the case, don’t force yourself playing like that, and go back to Windows native DirectX (unless dxvk really improves the game stability, which I highly doubt)
Interesting fact: I also tried with game set on dx9, and dxvk disabled (meaning Wine uses its default DirectX to OpenGL conversion) and the graphic result was the same. So (theory) it could be caused by the way the game engine handles the lighting in dx9 (using some exotic way?), but only the devs got the answer I guess (if you guys are reading us, let us know!). Maybe I could ask the dxvk devs what they think about that, but I’m too busy grinding distillates for now 