Brightness during sunset/sunrise and twilight hours should be higher

[francobfort]

Replace the atmosphere parameters with more accurate ones from ARPC

The main reason that we’re not getting XP12-ish results right now is multiple scattering not being enough, which is a limitation of both Bruneton’s and Hillaire’s implementations, in fact, because of that XP12 artificially boosts multiple scattering during sunset / sunrise to compensate for it. Multiple scattering gets rid of the green tint and makes the sunsets / sunrises brighter, just like real life. But this goes to show why it’s understandable that we might not get these changes in SU 13 o…

@Biology2394

Multiple scattering gets rid of the green tint and makes the sunsets / sunrises brighter, just like real life.