[Bug 38274] White water in Heroes VI

https://bugs.winehq.org/show_bug.cgi?id=38274

--- Comment #21 from Sergey Isakov  ---
(In reply to Stefan Dösinger from comment #17)
> Still, I don't think our ability to create or decompress s3tc textures
> breaks your game. It most likely breaks dxtex though.

Those bug 38178 are closed so I reported here new found.
no traces, no warn - crash after logo.
trace+d3d, d3d_texture, d3d_surface - same
warn+d3d - no crash .............

Can anybody explain me what is happen when I switch WARN_ON?