https://bugs.winehq.org/show_bug.cgi?id=44243
--- Comment #1 from Nikolay Sivov bunglehead@gmail.com --- Direct2D is a recent addition, and I know some vst plugins are definitely using it. Reason itself, at least some versions, is using double buffered API from uxtheme, that one was also implemented recently. So maybe you can do +d2d trace, and see if it's used at all.