Remove extra graphical resweeps, and smooth prior to despeckling. Was getting odd desync here without Land[] seemingly incorrect at end of passes. Just removing seems to fix, and code wasn't that good an idea in its prior state anyway.
Disable GL SetAttributes for Windows due to many testers with problems. This restores .15 behaviour.
If we can find willing testers, perhaps we can narrow down which attribute was the problem.
Also reenable F12 bind for Windows.