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.
Anyone know what those settings are?