I could never work out why, but when I play my map in the editor it is much brighter than in the game (looked much better in-game).
Now I realise that it is because I had post-processing set to Vivid in the game options.
I like how my level looks with Vivid post-processing, but I don't want the player to have to change the setting when playing my map. So I want to set the default post-processing settings for my map to match Vivid.
I don't think that's a good idea. One of the four post-processing settings are always applied, and if a player selects Vivid, its modifications are applied twice, which most likely isn't want you want.
If it produces odd effects I won't do it, or at least I won't use all of Vivid's post-processing effects - but I want to darken my entire map to a similar level to what Vivid produces, without having to re-light the entire map.
I don't know what any of the PP settings do, which is why I want to start by duplicating Vivid's effect - because the effect that Vivid applies is what I want my map to look like by default.
Because I didn't realise I had Vivid on, I couldn't work out why the map looked brighter in the editor. I ended up making everything a bit too bright so it would look right in-game.
I want to alter the map so how it looks now with Vivid, is how it will look without it.