My actual game runs pretty smoothly, with the occasional lag and jump but it's bearable.

When panning the camera around [changing it's direction/view] my game seems to slightly stutter and lag and that's extremely annoying. I've been told it's nothing to do with the game, but the camera. Is there an easy fix for this? I don't have all the expansion packs or stuff packs, but I have a fair load of mods and cc. I'm not sure what my graphics card is, and my game is patch 1.69 with medium graphic settings, but high tree detail. It also occurs when switching spectate from different sims. (meaning when I am playing as sim A, I switch to play as sim B).

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So could a rundown of specs for your computer. Video card, etc. Usually a lag or stutter is due to video card rendering, at least in my experience. Turn down graphics a teeny bit (does the tree detail really need to be that high) and see if that helps.

I turned down my graphics a bit, the camera panning is happening less, but there's still lagging going on. Any way to fix it completely?

Whether you can fix it completely depends on a lot of factors. Like, whether the lag is caused by insufficient hardware or because you're, for instance, playing a giant world with a bunch of trees on it that even a high-spec computer would have some trouble rendering quickly. Or both. Like ChickenMadam said, such lag is usually a result of your video card not being able to keep up with what you're demanding of it as you pan around. If you've turned down your graphics settings as much as you're willing to tolerate, then the next step would be thinning out your world a bit. If the world you're playing in is heavily wooded, for instance, then you might want to go into world editor and remove a percentage of the trees. It really all depends on the situation.

^^What iCad said. For example; my Twinbrook is laggy as heck. Why? Because it's full of CC, trees, etc etc etc. So I have had to make adjustments for my picture taking, and it's NOT the world I use just to play or build. I use Builder's Island to build - less "stuff" in the world, less lag. Had to remove some of the trees in my bayou in TB to get that particular lot to not lag (after clearing everything else out except the commercial buildings/removing people etc.)

The less strain on your GPU, the less lag you'll have - the less stuff the game has to render (CC, trees, etc) and the less detailed, the less the lag will be.

I didn't think that trees would cause that much lag, but obviously I was wrong by a long-shot. I'll go into "Edit Town" now and remove some trees and un-used buildings/lots. Thanks for the help! I'll update you on whether it was effective ( which it 99.9% will be ). :D

Shall I attach a video of it now? As said, it might help.