This adds exclusion bands around the sun’s exclusion zones of Bering, Omega-41, Tau-31 and Tau-23.
Those bands are using `cull_mode = 2` so only their sun-facing side is visible.
Also their fade distances was set up so they are mostly just visible when you are at the edge of the sun’s exclusion zones.
Same cull-mode and fade added for Tau-31 Harris exclusion band, too.
