https://bugs.winehq.org/show_bug.cgi?id=38216
--- Comment #5 from Sergey isakov-sl@bk.ru --- Can you give me a link on the demo?
I am using Radeon HD6670 in MacOS 10.9.5 if this does matter. I can confirm my observations with 1.7.38 as well as with many custom engines. The key difference is 1.7.24.diff