https://bugs.winehq.org/show_bug.cgi?id=43131
--- Comment #14 from Shmerl shtetldik@gmail.com --- (In reply to Józef Kucia from comment #12)
Created attachment 59744 [details] Quick fix
Please try if the attached patch fixes the issue.
I can confirm that this patch fixes invisible surfaces in TW3 (which appear near underground areas). Though it doesn't fix invisible monsters.