Hi Paul, Im running the very latest AMD Beta 14.3 drivers i think downloaded today. Im running in the video opengl 4, but have the same issues with opengl 3 mode. Ive also tried with the last official release AMD drivers and get the same problems. For example loading the Reflections example the entire editor just locks up but is not windows unresponsive, just sits their with geometry on screen but the the shader compiler stage doesn’t move, In opengl 3 mode the map opens and compilers shaders but the same graphic issues in the video ive posted so i would say it’s not just Opengl 4 related. Ive also compiled my own version of the engine to see if any difference and exactly the same outcome, In dx11 mode everything runs fine.