Sims appear to be grainy/pixelated?

AThirstyMonster  Well, I guess that setting is a bust.  That's why it was worth testing on a copy of the .sgr file, and like I said, I didn't know what the setting would do.  But please make absolutely sure you didn't add or change any other value, for example writing 4,096 with a comma could break things, as could accidentally deleting even one character.  If you're not sure whether you did that, you can try again with another fresh copy of GraphicsRules.sgr.

If that doesn't help, try changing the other setting on a fresh copy of the file, still in ConfigOverride.

And like I said, this is all experimental, but also not harmful in the long term.