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| IL-2 Sturmovik The famous combat flight simulator. |
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#1
12-10-2009, 01:31 AM
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Extremely odd behavior with IL2 yielding very poor performance
Hello guys,
I am losing my hairs trying to understand an extremely weird behavior I'm having with IL2. The problem worsens the more objects I have in the screen. When this happens, GPU utilization can drop to a mere 20% and my FPS simply plunge to the ground. The exact contrary happens when there are few or no objects on screen. My GPU utilization increases consistently and I get up to 120FPS when V-Sync is disabled. I simply don't understand. On the very situations when the GPU should be used to its fully extent, all I get is some bellow mediocre fps because the game (drivers?) don't push it the way it should. And when there's almost nothing to render on screen I get a huge amount of FPS because GPU utilization has increased. Let me show you some screen shots and I think it'll be better illustrated. I've set an A20 in the little town of Nitra in the Slovakia Map. The grid is D2 keypad 4 for reference. There's a tiny village to the East of this town and we'll use it as reference. When I look to the West in the direction of the Town, GPU use drops to 20% and my FPS hit 16 (they're always bellow 20 in this scene).  Now, when I look to the right at the tiny village where there are extremely few objects GPU utilization simply doubles and my FPS skyrockets. It'll hit 60 on the SS, but when V-Sync is disabled it reaches 120 and stays there.  Some external shots to further exemplify such bizarre behavior   My system specs are as follows: Phenom X4 955@3.7GHz Radeon 4890@930MHz 4GB DDR3 Viper Patriot I am running the game at 1680x1050 using 8 AA and 4 Aniso. No matter how low I leave AA and Aniso, the FPS will vary in less than 2%. I am using the version 9.10 of the catalyst drivers, but I have already tried 9.9, 9.11 and 9.12 Beta. The result is always what I have in the above SS. I am also including a copy of my Conf.ini file in case someone would want to take a look. Quote:
The only game I have such strange behavior is with IL2. I also play Crysis, Assassin Creed, Armed Assault 1 and 2 and all of them offer very good performance. I know I don't have a top-of-the-line system, but it should suffice to run IL2, should it not? I thank you for any help as I am out of ideas on how to fix this problem. 
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#2
12-10-2009, 02:09 AM
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You might try these settings
[Render_OpenGL] TexQual=3 TexMipFilter=3 TexCompress=0 TexFlags.UseDither=1 TexFlags.UseAlpha=0 TexFlags.UseIndex=0 TexFlags.PolygonStipple=1 TexFlags.UseClampedSprites=0 TexFlags.DrawLandByTriangles=1 TexFlags.UseVertexArrays=1 TexFlags.DisableAPIExtensions=0 TexFlags.ARBMultitextureExt=1 TexFlags.TexEnvCombineExt=1 TexFlags.SecondaryColorExt=1 TexFlags.VertexArrayExt=1 TexFlags.ClipHintExt=0 TexFlags.UsePaletteExt=0 TexFlags.TexAnisotropicExt=1 TexFlags.TexCompressARBExt=1 TexFlags.TexEnvCombine4NV=0 TexFlags.TexEnvCombineDot3=1 TexFlags.DepthClampNV=0 TexFlags.SeparateSpecular=1 TexFlags.TextureShaderNV=0 HardwareShaders=0 Shadows=2 Specular=2 SpecularLight=2 DiffuseLight=2 DynamicalLights=1 MeshDetail=2 VisibilityDistance=3 Sky=2 Forest=0 LandShading=3 LandDetails=2 LandGeom=3 TexLarge=1 TexLandQual=3 TexLandLarge=1 VideoSetupId=17 Water=0 Effects=1 ForceShaders1x=0 PolygonOffsetFactor=-0.15 PolygonOffsetUnits=-3.0 TexMipFilter=2 Specular=1 SpecularLight=0 You might want to go over to ubisoft community help --> http://forums.ubi.com/eve/forums/a/frm/f/49310655 and post your dxdiag printout as well. Last edited by nearmiss; 12-10-2009 at 02:14 AM.
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#3
12-10-2009, 03:59 AM
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Thanks Nearmiss... I'll also try that.
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#4
12-10-2009, 12:25 PM
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S~! Henrique
Your not alone mate. I have the same issues with lots of objects or cities. I can play CoD4 at over 250 fps with full action. The engine is pretty much done as far as newer hardware and especially drivers are concerned. Its 10+ years old so its prehistoric in software terms. Also nvidia will give you better fps over an ati card. I own ati but thats just the truth at this point. The major fps killers are water, effects and land geometry. Water=0 Effects=0 Land Geometry=2 ** Also check the way your mirrors are set. Even on planes with no mirrors - this setting can affect you if you have them set to high for any planes you may fly with them on. *** TURN OFF Vsync
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#5
12-10-2009, 01:01 PM
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S~!
Quick Addendum. I just found this over at the Ultra Pack site. I don't have time to test it till later tonight - but it looks very promising. Description: Quote:
. .
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#6
12-11-2009, 09:55 AM
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Apparently it doesn't improve FPS at all, but instead crashes the game with several maps...
Quote:
Quote:
Last edited by PeterD; 12-11-2009 at 09:58 AM.
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#7
12-11-2009, 03:45 PM
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Quote:
Are links to mods allowed here now, I ask as some will download this install it and have problems possibly ?
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