I am also getting massive stutters in NorCal and SoCal. I have worked through every slider and I cannot seem to isolate the problem. While running ProcessLasso, the scenery loads just fine for a time, then will suddenly peg to a 100% flatline. Nothing happens initially, but then you will see blurries, and then no autogen, and then followed by massive stutters some lasting upwards of 1 minute.
I can induce an episode by 1.) flying fast or 2.) turning in a new direction towards densely populated terrain. Pausing the sim and letting it recover will resolve the problem, but only temporarily.
This only happens in True Earth regions. Please help isolate and resolve this game breaking bug. 5.1 HF1