How do I stopping the day/night-cycle in the editor?
Try looking at the map, I don’t know for sure but it’s probably in there.
You can go into World->Lightning and change the time but it is a big nuisances.
I’m not really sure why they decided to have the the cycle running when building the maps if they also implemented a way the change the time. Better for editing would be to just change the time manually to what you want.
If all u want to do is to make the day/night color all the same, u can make that setting in the world editor, under layer setting (next to passable/impassable brush). Go to day/night layer and create new layer. Select that layer and use the editor below that (click). From there u can set the color each hour. But u can stop the sun movement/shadow.
Im typing this from hp since its storm outside but im pretty sure this is included in the modding guide.