I checked my nVidia card settings and I am not playing on Integrated settings. Whilst playing in a jungle on all three settings, I get about the same FPS each time. However, the root.gameRenderer.level.terrain started at about 62% and rose up slowly to 65%. Settings were on fast, no smooth lighting, with vSync and Advanced OpenGL on.
Happened to me too mate. I think it's because the launcher opens a new window with the 13w16a game. This causes the severe lag. I dropped from 150fps in 1.5.1 to 20fps in 13w16a. REALLY BIG inconvenience. 😞
I checked my nVidia card settings and I am not playing on Integrated settings. Whilst playing in a jungle on all three settings, I get about the same FPS each time. However, the root.gameRenderer.level.terrain started at about 62% and rose up slowly to 65%. Settings were on fast, no smooth lighting, with vSync and Advanced OpenGL on.