Heres my list of ideas (I was just building a map and they just appeared)
Custom map background music
Map voting in multiplayer - the host can choose 3 maps, and the players can vote for 1 of the 3 maps, something like in Team Fortress 2 (this could be good for when you leave your pc running for your friends to play)
Server browser - would probably encourage more players to play the game, a nice bonus would be something like a 24h server, the browser should also show private games with password needed to join wich could also be turned off if the person wants to)
Light sources - an option to make objects like candles and fire emit light in the level editor (there could also be a separate option in the settings for flamethrowers, torches etc. to emit light while in shadows)
Custom map background music
Map voting in multiplayer - the host can choose 3 maps, and the players can vote for 1 of the 3 maps, something like in Team Fortress 2 (this could be good for when you leave your pc running for your friends to play)
Server browser - would probably encourage more players to play the game, a nice bonus would be something like a 24h server, the browser should also show private games with password needed to join wich could also be turned off if the person wants to)
Light sources - an option to make objects like candles and fire emit light in the level editor (there could also be a separate option in the settings for flamethrowers, torches etc. to emit light while in shadows)