Lowers amount and height of light emitted by most anomalies during triggered active phase which seems to improve performance.
Alters visual effects so it is up to you. Are you willing to sacrifice something in order to gain more of that sweet FPS? Be glad it is not your life sacrificed this time.
Update 1: Stepping onto campfire causes less damage, less likely to accidentally die from moving too close to little bonfire
is this also for 1.4.22?
Downloaded 1.4.22, unpacked - there are less files in 1.4 than in 1.5. Seems like some anomalies sections were later extracted into separate files. But properties look same if I'm not missing something.
In short: try and find out, if anything just delete zones folder from gamedata/configs this will restore settings.