Sign in to follow this  
Guest Jagndeke

Stuttering clouds

Recommended Posts

FS9 runs perfectly on my vista machine with all settings maxed out except for stuttering clouds (low framrates with lots of clouds). No clouds = smooth as silk. A few clouds still = silky smooth. Bring in a few heavy clouds and then you notice a little framerate hit. All out storm clouds = a semi-slide show.I was wondering if anyone had any suggested tweaks or knows of a frame-rate friendly set of cloud files? I'd like to keep my settings at max if possible and solve the problem through a cloud mod file or other tweak.CheersJag

Share this post


Link to post
Share on other sites
Help AVSIM continue to serve you!
Please donate today!

Do you use Active Sky? If so, try the various resolution settings in Active Sky Graphics. I currently use 256x256 medium quality with great results. If not, there are replacement textures around, in this library and elsewhere that will reduce the impact on FR and still look nice. The one I used to use before I purchased AS6 was FS Sky World (fsw2004.zip). Hope this helps.dolph

Share this post


Link to post
Share on other sites

Thanks guys.Currently don't use AS. But I'll give your suggestions a try and see what happens.Cheers,Jag

Share this post


Link to post
Share on other sites

Hi Jim,I see where you and others suggest a 3D cloud percentage of 100 for folks experiencing cloud stutter issues. Is it safe to assume lowering this value actually increases stuttering issues? Just curious because one would be led to believe that lowering the percentage to say 50% would lessen stuttering. Seems counter-productive. Curious on your thoughts.Many thanks,Mitch

Share this post


Link to post
Share on other sites

I tried all your suggested fixes guys and didn't have any luck improving cloud performance. Too bad cause otherwise this install on a vista system runs flawlessly. Only with the hewavier cloud cover does it stutter. Thanks all for giving it a go.CheersJag

Share this post


Link to post
Share on other sites

>Hi,>>What are your system specs?>>Jim>>http://www.hifisim.com/banners/hifi-community-sigbanner.jpg>http://www.hifisim.com/Quad core Q6600 2.42gb DDR3 ramATI HD2400ProHitachi 500GB SATA HDRealtek onboard soundI've been mulling over whether the onboard sound could be responsible for this but I'm leaning towards "no". I'm thinking that maybe a different version driver for the graphics card might help... but not sure which version to roll back to. On my XP system I used to have a favorite Omega driver that worked great but it looks like he isn't releasing any modded drivers for Vista yet.Any thoughts from your side would be appreciated.Cheers,Jag

Share this post


Link to post
Share on other sites

I don't think this is specifically a Vista issue. I'm running Vista Home Premium with an ATI HD 2600 XT (not great I know) and I do suffer the same performance problems under certain cloud situations (really only when you get those very heavy, thick overcast layers). However, I had the same problem on my previous system with XP and an Nvidia card. I always dreaded that one situation where the real weather download would give me that heavy cloud layer at about 3000 feet or so becuase I knew it was going to be a jittery mess. Usually when I see that I just end the flight and go to an airport in southern california or Hawaii... :)You might could try lowering the cloud display density to medium or low under those circumstances as visually it doesn't make much difference since you can't really see the clouds through the gray fog much anyway...

Share this post


Link to post
Share on other sites

My system also has problems with clouds and frame rates.Windows XPIntel 3.2 EE single coreNvidia 7950GT 5122G of RAMI use Flight Environment for my clouds and my system is several years old, so clouds are what really drop my frame rate, but no so much as to make flying uncomfortable. Frame rates are around 12 FPS at the worst times with a PMDG aircraft in VC with weather being generated at a busy airport.But if you REALLY want to see frame rates tank, load up the 9 Dragons Kai Tak scenery. Even with detail set to medium, using the PMDG 747 in VC mode will get me a slide show of 6 FPS! EEEEEEK!One trick you might try is to set 'visibility' to around 20 to 30 miles and see if that helps. I know it's hazy, but hey, the sky's a dirty place anymore and it helps to hide the short draw distance for clouds in FS.Kim

Share this post


Link to post
Share on other sites

Kim I don't know if this will help as it involves a little money...I had the exact same problem especially at Kaitak 9 Dragons, the 6-7 frames I was getting in vc with the pmdg 747 ,nil traffic,nil weather was driving me mad especially as I was seeing screenshots showing 20-21 frames at the checkerboard.My spec was similar to yours,p4 3.4/2gb/7950 gt.I decided to get an immediate upgrade to a dual core e6850 and motherboard,same card and memory.The difference is nothing short of astounding in my case,I'm now getting 22-24 locked 24 in vc with pmdg747, 9dragons on approach and all the way through to touchdown, AND with all slders maxed ,50% woai traffic,asv6.5 with clouds.I only wish I had upgraded long before.regards Jim

Share this post


Link to post
Share on other sites

This is what I want to do except I'm stuck here waiting for the E8400, which is out of stock everywhere. I should have gotten it when it first came out...oh well, I may go for the alternative, the E6750.Jason

Share this post


Link to post
Share on other sites

Hi all,Same problem here.Built a new system about 6 weeks back spec's as;Asus P5k mbE6750 dual core2Gb Geil high performance memoryNvidia PNY 8600GTS graphicsCorsair HX620w psuHitachi deskstar 160Gb sata2 HDWindows XP.Asus 20.1 inch monitor at 1400x1050Runs FS9 like a dream,frames locked at 30,flying PMDG or Level-d into complex addon airports from the VC, no drop in frames or stuttering.Throw in some heavy detailed clouds anywhere, and frames are all over the place with stuttering.Situation rectified by ticking the simple clouds box and were back at 30FPS.Seems almost bizarre that such a small change in visual display quality can have such dramatic results,but hey this is flightsim.Back to head scratching mode. all the best. Garry EGNM.

Share this post


Link to post
Share on other sites

Hey Gary, I have the exact same problem as you, same specs except ATI HD3870 512mb Everything smooth as silk into to most detailed airports (heathrow + frankfurt Aerosoft) with 747F everything maxed out. as soon as I max clouds it starts jerking, but in a diffrent way to when I had a low spec machine. I have decided to do one last upgrade new motherboard 4 gig of the fastest ram and the new Wolfdale dual core clocked at 4ghz with watercooling.. If FS9 still gives me trouble I'm going to take a break till FS11. What annoys me is even with max clouds and stutters the FPS is pegged at 30 :(Rob

Share this post


Link to post
Share on other sites

Thanks all for everyone's feedback. I'm pretty much convinced now it's a vid driver issue. I may wait for Omega to finally getting around to releasing a modded ATI driver for Vista or I might just try rolling back to an earlier ATI stock driver. Whatever I try and if it works, I'll post back.Cheers,Jag

Share this post


Link to post
Share on other sites

I just got a new system as well based around an E8400. Best performance ever, but throw in some clouds and the frame rates go down noticeably. Not to the point of a slide show, but it's definitely less smooth, not really stutters though. Especially as you fly through them. Once you're clear, either above or below, everything's fine. Using the 7.10 Omega drivers on XP Pro, they don't get any better than that.By the way, "some" clouds isn't exactly true. It's a massive amount of clouds. And multiple layers of them. Active Sky generated and I'm using the 128*128 DXT set (looks fine enough to me).

Share this post


Link to post
Share on other sites

I cant seem to get my head around the fact that these machines run FS9 so fast in dense scenery, but clouds cause problems. My Jaw dropped flying into Heathrow with a insane amount of scenery around me, and my trackIR was flowing smoothly like I was in the Default 737 in the middle of the Pacific ocean. Does anyone think there could be a problem with the new CPU's and FS9 computing clouds? or a problem with the new Graphic cards?Rob

Share this post


Link to post
Share on other sites

>Does anyone think there could be a problem>with the new CPU's and FS9 computing clouds? or a problem with>the new Graphic cards?>>RobCould very well be Rob. On my old XP machine I had just the right combination of FS9 tweaks and vid card driver to be able to max everything out with great FR's. The vid card driver had the largest impact. I know because I tried at least a dozen or more and could have, at one time, released a rating for each driver in terms of performance in FS9. I'm sure that it was a combination of the hardware design and the software design for the vid cards and how they worked together (or didn't work together depending on driver version) to "read" and display the code in FS9 that made it better or worse.Today's hardware design is different, the software design is different, and it's likely that they work together differently to read and display the same old FS9 code. Which is probably why many of us have this "new" issue of cloud rendering difficulties on vastly more powerful machines than we had on our older gear. Somewhere though, there's gotta be a fix and it'll take a little time to find it but I'm sure we will.Cheers,Jag

Share this post


Link to post
Share on other sites

>Today's hardware design is different, the software design is>different, and it's likely that they work together differently>to read and display the same old FS9 code. Which is probably>why many of us have this "new" issue of cloud rendering>difficulties on vastly more powerful machines than we had on>our older gear. Somewhere though, there's gotta be a fix and>it'll take a little time to find it but I'm sure we will.>>Cheers,>JagOh no I'm not buying no core2duo now...staying with my good old 4000+ is the way to go? Those of you who have this poblem here all use the newer C2Ds correct?Jason

Share this post


Link to post
Share on other sites

>Oh no I'm not buying no core2duo now...staying with my good>old 4000+ is the way to go? >>JasonNot at all Jason. New technology just means new problems (or resurrection of old problems in some cases). I upgrade at every chance I get (which is usually when my wife isn't watching!). I'm sure there is a fix for this problem. It'll just take time to figure it out.Good observation on processor usage. Could be that or the change to Vista or the change to PCIe cards from AGP cards. For those of us having the issue, there's probably some commonality amongst our software or gear that might help at least understand the issue if not resolve it.Cheers,Jag

Share this post


Link to post
Share on other sites

Hey Jason,Trust me these new core 2 duo's are mind blowing, Liquid smooth with every add on Maxed... and despite the issue I am having I will still never go back to the frustration and tweaking on my old P4 3.2 Hyper threading and ATI X1950 512mb.I think/Hope it is a driver issue, as i did need to hunt around with my old setup. ATI 7.10 drivers worked best for me so I will give it a try when I get back to the UK. I should also add that problem is only severe when I have Heavy weather (Thick overcast and 3 or more cloud layers)Rob

Share this post


Link to post
Share on other sites

Hi Rob,Have been doing a little research this evening, running in heavy clouds framerate starts to yoyo from a locked 30 to as low as 10fps though stays mainly in the low 20's.Switching to windowed mode gives a slight improvement but the fluctuations are still evident.Running filemon shows nothing out of the ordinary.Looks as though we have a Gremlin in the mix, and where he is I don't know.Noticed you are running ATI graphics and I'm with Nvidia so not so sure its a driver issue.Have to agree with you on the performance of the core2duo in fs9.I upgraded from a P4 3.4G 7600gt graphics and the performance increase is mindblowing,the P4 is now on internet duties.Previously could only fly the 2D panel of complex airliners due to performance limitations but since I built this new machine have flown only from the VC, and for me personally flightsim satisfaction has gone up several notches.Hope someone can nail this cloud issue,in the meantime all the best. Garry EGNM

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this