This has always puzzled me too - I saw it in SH3 and again here in SH4 - I've seen it on several different cards over the years since SH3 came out - ATI 9800 Pro, nVidia 6800, ATI X800XL, and now on my nVidia 7950GT. Generally very good graphics, but the sky color/pattern rendering in both SH games really bites for some reason (sometimes really bad, sometimes barely noticeable, but always annoying). I've never been able to solve it despite lots of playing around with various driver settings and multitudes of driver and card updates and resolution changes.
Would be great if somebody could pin this down as to what's causing it.
__________________
|