http://bugs.winehq.org/show_bug.cgi?id=34284
--- Comment #2 from Henri Verbeet hverbeet@gmail.com 2013-08-17 15:39:59 CDT --- The issue might be that the driver doesn't support rendering to luminance textures, afaik that's generally not supported. I wouldn't necessarily expect D3DFMT_L16 to be renderable on Windows either though, so it would be good to confirm / deny that with dxcapsviewer or a similar tool. The issue might just be that we should be stricter about failing surface creation for unsupported format / usage combinations.