UDP TCP message every arena. Played the Euro map big mission and was UDP\TCP discoed at the end after the bomb drop.
Clouds in the capture the flag arena seem to have been reduced in density. I tested them by flying the length of the banks inside the center switching from cockpit view to F3.
1. - Post lighting on, clutter off, 22-25 fully enclosed inside the clouds. 30-40 if any sky or ground in showing. 30-42 everywhere else except at high alt.
2. - Post lighting off, environment slider 0, clutter off. 25-27 fully enclosed by cloud, 30-50 if any sky or ground is showing through. Everywhere else 40-60 depending on surroundings.
A personal preference. The relationship between light, ground, and the cloud shadows on the ground, is visually more realistic with post lighting off. In the Euro B17 mission, with PL on, my FPS would drop to 12-14 when my B17 was close to other B17. With PL off, FPS would be 20-32.