https://bugs.freedesktop.org/show_bug.cgi?id=91656
--- Comment #11 from Daniel Scharrer daniel@constexpr.org --- There is also a glClear though. Currently the texture read ends up with the data before the clear (uninitialized for the first frame, unitialized content with the fog of war blended on top n times for subsequent frames). Are you saying the texture reads should get the color from the clear without any synchronization?