https://bugs.winehq.org/show_bug.cgi?id=39464
--- Comment #5 from Armin Altorffer aapmak@gmail.com --- (In reply to Michael Müller from comment #4)
I just tested it on my system and everything seems to work fine. The demo uses OpenGL, so the behavior heavily depends on the underlying driver. I am using the proprietary nvidia driver, what driver do you use? The output of glxinfo might be helpful.
(or, chrome://gpu)
GL_VENDOR X.Org GL_RENDERER Gallium 0.4 on AMD SUMO (DRM 2.43.0, LLVM 3.7.1) GL_VERSION 3.0 Mesa 11.2.0-devel (git-a443b5b 2016-01-26 vivid-oibaf-ppa)
I'm not quite confident it is driver related however; I'd have expected more titles (demos, games, etc) to demonstrate this kind of rendering issue. And so far, I can't say I've ever seen this phenomenon or something like it before.
However, the fact it runs OK for you on nVidia's binary blob and doesn't for me on the open source AMD driver stack does hint at something in that direction.