Hope this hasn't been asked before, but I've been Googling for like 30 minutes so it might just be time to ask. I've been trying to make a Quake 1 map in TrenchBroom for Arcane Dimensions which takes place mainly on a giant elevator, and whatever entities I put on top of it seem to just not receive any light, even though the brush itself is being lit just fine. So if, say, I've got a point_light angled straight down over an item_health, the func_train underneath it receives the light, but the item_health remains entirely pitch black. Is this something that can be solved, or just an unfortunate quirk of working with func_trains? And if so, is there any kind of hack I could use to get around it? I've wanted to make this big elevator map ever since I first played the finale of ad_necrokeep, and I remember there being a normal-looking armor2 on the platform when that section starts, but I've had no such luck. (For what frustration this problem has caused me, I will say that fighting pitch-black monster_skullwiz's looks very cool.) 

The entities take the light value from the "ground", which is the worldspawn (level's static geometry). Stuff like trains, doors, buttons (func_#### and similar brush models) aren't considered "ground" because they aren't worldspawn.

This video should help:

https://www.youtube.com/watch?v=u8-mw79NGDU 

Is it possible to cahnge the value of gravity during the level? e.i. I'd like to have low gravity in one room.

I also forgot, how to put dead bodies on the map. I remember killing monsters somehow, but can't quite remember the optimal way. 

hypnotic and some other mods have triggers that set gravity on the player so you can place those triggers at all the doorways where gravity needs to change. (should be pairs of triggers so that it gets reset if you go back out.) Entities that spawn inside the room need their starting gravity set explicitly using “gravity” field on each entity. 

I wanted to slow down the fall of the player. My initial thought was to make an invisible moving platform, but it worked awful and broke my level. Then I tried trigger_push (pointed down), and it did the trick beautifully.