Hello,Last night, while flying straight and level through big fluffy scattered clouds at FL140, and with ActiveSky wxRE enabled, I found my frame rate dropping dramatically to 4, sometimes 2 fps. If I changed my view to be straight down to the ground below (press the 5 key on the numeric keypad), my frame rate would jump to 15 to 24 fps.I appreciate this is NOT a problem due to ActiveSky. I'm just curious if others experience the same. It would seem that drawing big fluffy clouds, and making them move, and making them semi-transparent, etc, is quite taxing on the computer. Do you agree?Cheers,PeterPS: I have a 2 GHz PIV with 512 MB DDR RAM and Ti4400 GPU driving two 19" monitors with full screen hardware acceleration across both monitors, and almost all display quality sliders at max, and ATC traffic at 100% :-)

It is true that drawing clouds (or any significant weather) does hit the frame rates.The only solution I can offer is turn down AI, this is known to have a big impact, and bring your display settings back to a level you can accept.Before any of that though stop any background tasks that are not needed so your PC can devote all its resources to FS.

Hi Peter,-You can reduce your cloud density lower then 100%, like 60% , it will help.-You can use fsw alternative clouds pack, most of the cloud sets have better frame rate then the default fs2002 clouds.ThanksChris Willis[link:fsw.simflight.com/FSWMenuFsSim.html]Clouds And Addons For MsFs

Yes it is, FSW clouds are much better than default ones in fs2002.But, for what I can see on my PC (1.7GHz PIV), when flying in the vicinity of cumulus (puffy) clouds, the frame rate decreases always, even with AI traffic scaled down. If it stays at leat at 8-10 fps it's not a problem and usually it stays above.Anyway, using FSW cloud, reducing AI traffic, reducing cloud density around 60-65 %, max visibility at 60 miles, will certainly help.Enrico