@wrosecrans

Yes, I'm rendering using a QOffscreenSurface on a separate thread then displaying the frame on a QWindow on the GUI thread, but it makes sense to have all of the video rendering on the same thread so we're not interfering with the GUI thread.

I've successfully tested this concept with GLFW-based OpenGL windows and QT UI. I doubt Vulkan will be any different since from what I understand the render window will still need to sit on the GUI thread.