I logged into the melee arena briefly last night with the sun on the horizon. The weather system was running far too fast with clouds whizzing across the sky. Also they looked a bit odd, glowing bright yellow-green. I'd have thought looking into the sun as in this screenshot they ought to be silhouetted and dark, or just lit on the sunward side.
One other cloud related issue is that engine oil smoke and flak is always sorted behind clouds, even if the clouds are a long way away.
