Cloud Draw Distance- Lower Settings?

Hi,I set my visibility to 20 miles in global weather, as I personally think the haze and such looks realistic (at least for flying over humid south Florida). But it seems that you can't set cloud draw distance to less than 30 miles in the display/weather settings slider. Thus my CPU is wasting effort to draw clouds 10 miles further out than I can see.So I was wondering, is there a way to get into a .cfg line or something to limit cloud draw distance to something less than the 30 miles the slider only goes to?Best,Joel