From: Stuart B. <stu...@ya...> - 2009-01-16 15:40:48
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Curtis Olson wrote: >On vendredi 16 janvier 2009, Martin Spott wrote: >> Occasionally I notice the current clouds getting _really_ dark when >> they are getting close to the ground (EGKA RWY 20): >> >> http://foxtrot.mgras.net/bitmap/FGFS/EGKA-161250Z.png >> >> The corresponding METAR is: >> >> EGKA 161250Z 20011KT 0800 -RADZ FG SCT001 OVC002 07/07 Q1015 >> >> Martin. > > I believe the 3d cloud code darkens the clouds as they get closer to the surface (?) but > maybe the darkening function needs to be tweaked and tuned. > > Curt. Not quite true. For a given 3D cloud, the areas facing away from the sun, and the areas at the bottom of the cloud are darkened to give the cloud "body". However, the effect is pretty subtle, and isn't dependant on closeness to the surface. From the screenshot, it looks like a a 2D layer rather than a set of 3D clouds. -Stuart |