So started far too late really. Cracked on with the joy of compute shaders and lighting. Was supposed to do another run through of presentation but never got round to it. Walked Sasha, only did half hour as was going out later. Did more. Went out to do an odd Geocache in the middle of nowhere. Came back and did a bit more followed by just over two hours of studying. Had a shower. Finally ate at gone midnight. Now very much time for sleep.