Hello!

 

I have this incredible addom, and I am terrible happy with it when there are not clouds around. I have a 4.2ghz CPU with the Nvidia 780 and goes smoothy well fixed at 30fps.. PERFECT

 

BUT when there are clouds.. AND rain or fog.. I have a descent of FPS to 14-16 or so Investigating more on this issue.. it seems that clouds in dx10 makes AA when we set it in FSX.. and I have to in FSX to let have AA in the plane buildings.. etc....

Seems that there is a problem with the cloud shader in dx10.. something that it doesn't have in dx9... and never happened to me. If I switch off AA, then I have back my lovely 30 fps...

 

Is there a way to solve that cloud shader or some kind of fix for this horrible issue?

 

Thanks!

 

In Nvidia Inspector I have this configuration:

 

Antialising behavior flags: Override any application setting as Application controlled<

AA Gamma correction - off<br />

AA Line gamma - Default<br />

AA Mode - Application controlled<br />

AA Setting - Application controlled / off<br />

AA transparency Multsampling - Enabled<br />

AA Transparency Supersampling - 4x Sparse Grid Supersampling<br />

NVIDIA predefined FXAA usage - allowed<br />

Toggle FXAA indicator on or off - off<br />

Toggle FXAA on or off - off<br />

<br />

the AA is set inside FSX.</p>

Hi Japo: I can tell you that AA in clouds is being addressed by Steve at this very moment, and quite large frame improvements are being reported by testers, so you can expect an update in the very near future.

 

While not being wholly responsible for a drop in clouds - there are other parameters which will cause this too, so you might post your fsx.cfg here (attached as a .txt file) so we can look at it. Similarly - a processor running at 4.2 GHz is not going to yield any kind of good performance that will meet your expectations of getting much better results without rolling back other sliders. 

 

I hope this helps a little.

 

pj

Thanks for the reply!

 

Here is attached my fsx.cfg.

So if I understand well.. the issue is reported, and work is been done? Good!

 

 

Thanks!

 

edit: I see that TEXTURE_MAX_LOAD is in 1024 there.. That is because I modify something in graphics.. I use 2048. The clouds resolution are 1024.

Whilst I am testing changes to the cloud shader any gain is perhaps 20%  and I am not happy yet that there are no side effects. 

 

I would suggest reducing your AA level a notch, so go to 4x Super Sampling or 2x smart grid.

Also - bring back water to 5, texture resolution to 28, drop the freeway density to 10, cloud draw distance to 3, cloud coverage density to 7, Fibre_Frame_Time_Fraction to 0.2 or even 0.17.

As Steve suggests - these:-

 

MultiSampleQuality=16

MultiSamplesPerPixel=4

 

are also too high. 

 

These are the killers.

 

pj

Well.. I tried.. and nothing.. still I have frames drop. I think less.. but still I have them. Even now deactivating the antialiasing it continues with the fps drop. 

I think it is not of fsx.ini It goes perfectly smooth even with clouds .. but when I enter them in certain clouds (the very dense ones) then I have the frame drop. Maybe is a fillrate  issue.. but my video card is a 780... well.. FSX....

Your GPU might well be two Titans, Japo, but it won't bring your CPU up to 4.6, 7, 8 or 9, where it needs to be in order to handle the extra load of heavy clouds and rain, while still achieving the same high frame rates.

FSX using DX10 is quite smooth down to about 22 frames, before noticeable stuttering begins to happen. Steve is working at a fix for AA control for clouds, but until it's released I think the only solution is to either lower your sliders - and your expectations - or you "up" your processor speed.

 

Incidentally, Japo - I know you'd like to see that magic "30", but from personal experience - I will absolutely guarantee that you will get scenery areas, airports, etc., in combination with AI, GA or road traffic, plus rain and cloud - where your frames are going to drop - even with a 5.0-gig processor and a GTX 580! Read my PC specs. They've been at 5.0-gig for a year or more, with the 580, and with a 780 for the last three months..... 95% of the time - it's 30, but there are still combinations which will bring the PC to it's knees.

 

Don't get hung up on it, and don't let it ruin your hobby.

 

All the Best,

 

pj