Hey i just followed your YouTube link to this thread and I think its really useful. I can't add much to this, the only thing i found out that i would consider really interesting is something i can't actually say since I'm making a map out of it and I don't want anyone stealing it, but i'll be sure to post it here after i finish the map (don't count on that being any time soon though, I'm a very slow forger >.<)
Anyway if there are any real forging rookies here I suppose there is no harm in stating obvious tricks and trivia, like:
1) You can create bushes by sinking trees into the ground. retrieve the trees using a teleporter.
2) If you want to make a hide / seek style map with trees / bushes, consider setting player traits to 'good camo' and 'overshield'. This makes players easily visible to the eye, but you can't see their red name through leaves, something that ruins most hide / seek maps. Sadly this trick does not help the red name problem in the 'fog' underwater, as vis effects show up in the fog even more than red names.
3) forging at sea level creates a really nice looking low lying fog aesthetic.
4) trivia: when messing about in this map, I discovered that the only weapon with completely unlimited range is, quite unexpectedly, the railgun. From what i remember, at maximum sniper rifle range the delay of the railgun shot takes about 7 whole second to reach its target!