I have noticed that recently the indoor dungeons seem to cause some strange 'stuttering' or 'juddering' when looking around in certain areas.

Can anyone comment?

Is it 1.2 patch related? Or?

I am running various mods but have lowered my shadows to medium and taken the shadowmapresolutions down in the inis to no avail...

Can anyone confirm it is the broken patch that has caused this to put my mind at rest?

Cheers

(on an i5 2500k @ 4.5Ghz, GTX 580, 8GB Ram etc)

Patch 1.2 was not the cause of this for me, I had it happening before. It was related to my shadow quality setting.

First I would try and go back to your default .ini (so no mods), make sure you are using the latest Nvidia drivers (currently BETA), then reset your detail settings to Ultra, disable AA, enable FXAA and bump Shadow quality down to High. Worked for me, so for your 580 it should also work.

Ok, I can confirm that forcing VSYNC on in the Nvidia control panel and then enabling Triple Buffering solves my mouse lag indoors (due to framerate drop). So I can now enable Ultra quality shadows with no mouse lag. The framerate does still drop in certain indoor areas but it doesn't seem to be nearly as bad as it was before I forced VSYNC+enabled triple buffering through the NV control panel. Have been playing like this for the past few hours.

I'm not sure if I'm imagining things but the GPU usage seems to be lower in more areas now (when the FPS is capped at 60) whereas with the in game VSYNC settings it seemed to be maxed out even at 60 FPS...I am using MSI Afterburner + the MSI onscreen display server to see my FPS in game (Fraps only shows FPS, this app can be configured to show GPU usage, temps, mem usage all in game)

Ok, after quite a bit of time playing I did run into some areas (heavily forrested during a snowstorm) where the FPS with Ultra shadows enabled was running in the 40's. Changing back to High quality shadows means it runs at a constant 60. So I guess I'll stick with High quality shadows after all (game runs buttery smooth in all locaitons). The mouse lag is gone, but it still does feel different from a constant 60 FPS.

It's not the shadows, not sure where folks got that from. I have terrible frame rates in interior cells with light sources. Steady 60 fps anywhere in the game except inside a single room interior cell with a candle in it. Then I'm lucky to hit 30. It's the AA. Turn it off and everything goes right back to 60 fps. Their AA is broken somewhere.

My two cents. I'm using a GTX 550 at 1080p. With the game defaults set to ultra I turn off AA, lower shadows to high and select the FXAA option. In the nVidia control panel I set AF to 16, AA for tranparent objects to 8, enable v-synch and triple buffering. This has been running smooth indoors and outdoors. The shadows are still something you'd expect from an 8 bit game from the eighties but the edges are softened enough to be tolerable.

One thing I'm not clear on is the display settings within the game. When I checked this all the sliders were to the right except brightness so I pressed use defaults. It is possible this changes something imposed in the launcher settings other than what I did manually.

It is the shadows in my case. I have AA disabled (with FXAA enabled), with shadows on ultra I have a inconsistent framerate (mostly in a few indoor locations), in these locations I get a solid 60 fps with shadows set to High. AA definately affects performance as well but I've disabled it so it's not the problem...

Me too, the only setting that fixed my fps loss in dungeons has been shadowmap resolution

Yeah I really think the AA is minor compared to the shadows. Its just a shame there is a such a vast difference between ultra and high shadows in terms of visual quality. I wonder, when Beth say they are prioritising 'hard coding patches', if that means they may optimise this.