http://bugs.winehq.org/show_bug.cgi?id=35783
--- Comment #34 from Sam Watkins sam@nipl.net --- Created attachment 48946 --> http://bugs.winehq.org/attachment.cgi?id=48946 hacky patch to wine, to prevent Risk of Rain from freezing, disables fog if env. var WINED3DFOGOFF=1
I modified my patch so can optionally disable fog, using WINED3DFOGOFF=1. If that's set, fog is disabled and Risk of Rain works okay without freezing.