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IL-2 Sturmovik: Cliffs of Dover Latest instalment in the acclaimed IL-2 Sturmovik series from award-winning developer Maddox Games.

View Poll Results: Stutters and FPS post patch
Better FPS and less stutters 176 45.71%
Better FPS and same stutters 115 29.87%
Same FPS and less stutters 40 10.39%
Less FPS and more stutters 31 8.05%
Much worse FPS and much more stutters 8 2.08%
Much better FPS and much less stutters 15 3.90%
Voters: 385. You may not vote on this poll

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  #1  
Old 04-09-2011, 05:05 AM
352ndBushpilot 352ndBushpilot is offline
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Join Date: Feb 2010
Posts: 36
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Better fps, less stutters on my desktop:

win 7 32 bit
q6600 2.4
4 gig RAM
NV 560 ti 1 gig

On my laptop the performance has decreased though:

win 7 64 bit
i5 560
4 gig RAM
ATI FirePro m5800 (not suppported, which is a shame)

cheers,

BP
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  #2  
Old 04-09-2011, 06:10 AM
b101uk b101uk is offline
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Location: UK
Posts: 80
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Well I voted for “Better FPS and same stutters”

And I will quantify that below,

System specs:
I7-920 @ stock speed
6gb of ram (3 x 2gb in 3 cannel mode)
GF GTX275 (stock speed) with NV 270.51 drivers.
Win 7pro 64bit (running like classic win2k desktop/folders etc I.e no XP/vista/win7 desktop/folders FX)
OS & Steam on separate dedicated HDD.
Running NO pagefile (I haven’t for >6 years, but it has been enabled for shutter testing on its own dedicated HDD but it makes no difference as there is >3gb free RAM that windows will use as VM before paging VM to HDD pagefile)

Game settings:
1280x720 @ 60hz full screen, AA = x2
Modal detail, Damage decals, Building detail, Land detail, Visual effects = Medium settings
Buildings amount, Land shading, Forest = Low
Grass & Roads = On
Shadows, Anti epilepsy filter = Off

Quantification:

Test1.trk
Pre & post patch frame rate info was gathered with FRAPS using a 160sec benchmark using a repeatable .trk file of a decent from 2200ft above RAF Ford to land at RAF Tangmear (200ft) with 8 other planes circling to land, this .trk has never exhibited any shuttering either when originally flying it or subsequent replays.

As above game settings:
Pre patch = 8609 frames, 28 Min, 79 Max, 53.806 Avg

Post patch = 9946 frames, 39 Min, 78 Max, 62.163 Avg

As above game settings except for 1600x900 @ 60hz full screen, AA = off:
Pre patch = 7614 frames, 26 Min, 62 Max, 47.588 Avg

Post patch = 7891 frames, 31 Min, 61 Max, 49.319 Avg

Test2.trk (perceived shutter testing with buildings)
Pre & post patch frame rate info was gathered with FRAPS using a 160sec benchmark using a repeatable .trk file of a decent from ~2500ft to low level over a larger town which is over flown twice in opposite directions

Buildings in numbers larger than a small village are about the only cause of shutter for me when flying low, given frame rate is independent of “shutter” for me, with buildings the increase in frame rate matches similar % increases to the minimums & average frame rates collected above for pre and post patch though many more permutations of building detail level & building amount were tested with the aim of perceiving shutter.

A: With Building detail = Low & Buildings amount = Low Vs. With Building detail = High & Buildings amount = Low, has minimal impact on frame rate and the same amount of shutter take place

B: With Building detail = Low & Buildings amount = unlimited Vs. With Building detail = High & Buildings amount = unlimited, has minimal impact on frame rate and the same amount of shutter take place, the frame rate is slightly lower than A: above (~5fps lower but we are still talking >30fps) and the shutter has a slightly different nuance to it and could be said to shutter fractionally less than A: above especially when over the centre of the town as there is a perceived smooth spot ware all the buildings are in view so have loaded.

To me the problem with buildings is threefold, 1st: the mechanism in how they are loaded into the game world and when. 2nd: the amount of LOD’s used for “flying” situations when there is a lot of irrelevant detail being shown for flying at even at just above roof height but at high speed. 3rd: how setting Building detail = Low only serves to reduce the distance each LOD will be seen but NOT also the highest detailed LOD that can be seen.

So e.g.
on Building detail = Low with Buildings amount = Low, you get a performance hit from the quantity of buildings loading and unloading rapidly from view in a short space of time, you get a performance hit from successive LOD’s loading rapidly and a performance hit from the detail of the highest detail LOD being shown.
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  #3  
Old 04-09-2011, 10:18 AM
dali dali is offline
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Join Date: Feb 2010
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I get aproximately 30% less fps than pre-patch version. Dogfights over sea were fluid before, now I can't even use cockpit view any more due to loss of fps..

Vista 32-bit
4 Gb DDR2
Core 2 duo E6850 3 GHz
XFX Geforce 8800 GT 512 Mb RAM
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  #4  
Old 04-09-2011, 06:35 AM
naz naz is offline
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Join Date: May 2008
Location: Sydney, Australia
Posts: 152
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Patch is a generally good improvement for me.

System Specs
i7950 @3.66
6 Gig 1600 Ram
ATI 5970
Win 7 64 Bit

Running game with:
1920x1200 (Native), No AA, Fullscreen.
Model Detail, Visual Effects, Damage Decals -- High
Building Detail, Land Detail, Land Shading -- Medium
Forest, Building Amount -- Low
Epilepsy Filter Off
Grass, shadows - on
roads Off

A big difference for me is also having aero turned off. It improves the stutters considerably for me (unfortunately this creates some tearing when using TrackIR which triple buffer does not fix...but its not so bad and I can live with it for now).

Stutters do remain however..over water in a 6x6 dogfight, when several of the opposing planes are in view as we merge. Also when really really close to another plane.

...over land, stutters whilst definitely improved are still there for me despite good FPS of 30-40 (with occasional spike up or down by 10 frames or so).

I wonder if the issue for the 6xxx series of ATI cards that Luthier mentioned a possible hotfix for also affects the 5xxx series?

Anyway, all in all, the patch is a good result in my view... I was able to scream over London in my Spitfire with very playable frames in a free flight whcih was awesome.

I thought everything was smooth over water pre-patch for me, but since the patch, my fights over the channel are at another level now. Apart from the minor stutters mentioned above, the game is pretty much perfect over water for me now...and definitely playable over land. A full on fight with lots of planes over London may well have to wait until the SLI/Xfire fix and the multi core optimisations, but i am more than confident now the game is going to be a masterpiece.

Well done Luthier and team. Keep up the good work.
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