https://bugs.freedesktop.org/show_bug.cgi?id=98238
--- Comment #18 from Shmerl shtetldik@gmail.com --- I compiled the latest Mesa master (git-2ab2be092d) which includes the recent fix from Marek: https://cgit.freedesktop.org/mesa/mesa/commit/?id=59c5da40ed2c6c56e29b562c2e... and the bug is mostly gone, but it still happens in few areas for example on the brick city walls and gates in Flotsam.