Camera movements very choppy since BH patch

karoschmitz​  That is very helpful, and 3 is especially illuminating, since it pretty much confirms that the problem is the game recalculating the LOD to use and I suppose reapplying it.  I'll pass this along too.

I didn't test the game itself with the include line deleted, past confirming that I could load a save with no apparent problems.  It was more of a throwaway experiment for me.  But looking at TS4CommonRules, most of what's in the file looks like it should be in GraphicsRules or Options.ini, and maybe used to be or even still is, although I didin't go through and check every entry.  There are a couple of lines I didn't recognize near the top, so perhaps those are significant and the CPU and texture memory ratings are just for reference within the file itself.

The game is supposed to use all of the relevant files in Bin (also GraphicsCards.sgr and Default.ini) unless a specific file exists in ConfigOverride.  So I don't think that the game is would disregard the Bin version of TS4CommonRules, or not use it in certain contexts, just because it wasn't in ConfigOverride and the include line were deleted in GraphicsRules.  But I'd have to find something specific to test, and it's not as relevant since it's easy enough to drop a copy of TS4CommonRules in ConfigOverride.

Maybe the frameratelimit would be a good candidate: there's also a setting in Options.ini, so it would be easy to see whether the value in TS4CommonRules is being respected, e.g. change Options.ini to 60 and TS4CommonRules to 30 and see what happens.  I'm not asking you to test, just throwing it out there.

Anyway, this is great information and something I'll keep in mind for other users with the same issue.  I'm surprised there aren't more complaints, but perhaps a lot of players are used to sub-par performance and perhaps play on smaller lots and/or zoomed in to avoid the worst of it.  But it's great to know that the game can be smoother with a little work.  Even better would be for the game to have more optimized settings, but who knows when or if that will come.