One of each UT4 item works quite well, or just the blue itself.
Of course having a practical light source like a flaming sword or lightning hammer is much better if you are indeed using those weapon classes.

Also worth noting is that mutant animal blood glows. It's pretty neat lighting up a corridor with the gore splattered on your chest, and fleeing mutants can light up the entire way to where they're hiding!

A trip to UT4 can net you some of the more pretty ones

I am not entirely sure, but I have definitely encountered a UT secret room at least once, perhaps twice.
Chances are it was a variant, something in the back of my mind says it was IVANT but can't say for sure.

In any case they are NOT common and are very hard to find unless say a landmine blows up a hedgehog and reveals one.

EDIT: Had a look through the variants. Turns out it is LIVAN that has the potential to spawn a secret room in UT:

RandomLevel 0:2;
  {
    Room /* vault */
    {
      GenerateLanterns = false;
      GenerateFountains = false;
      GenerateDoor = false;
      GenerateTunnel = false;
      AltarPossible = false;
      Size = 7,7;
      Flags = NO_MONSTER_GENERATION;
	  UseFillSquareWalls = true;

	        Square, Random;
    {
      Items == Random { MinPrice = 250; MaxPrice = 2000; }
	  Times = 3:9;
    }
	  
      OTerrainMap
      {
        Pos = 1,1;
        Size = 5,5;
        Types
        {
          x = BALSA_WOOD wall(BRICK_OLD);
        }
      }
      {
        xxxxx
        x...x
        x...x
        x...x
        xxxxx
      }
    }
  } 

Secret rooms can also spawn in UT, although the only time I've ever found one was in UT2. And it was full of active bear traps.

Wait wait wait, you found wands of mirroring in a polypile?!
Also no you can't clone them, sadly.

If I find one early into UT I also like to haul them to New Attnam on the off chance that a hostile genie gets a lucky hit in on Decos so I can use his armor.
They're also an unbreakable light source for the Enner Beast floor.

Not true, at least in CVS:


This does work:



Lost limbs do carry over to the match, hence why people like to make him lose his legs on vomit/bananas/broken glass.

You might also notice the tourist group got caught up in my antics.

Likewise you could set "cold resistance" on different materials. Would be a good excuse to get some new armor types in (ugg boots, fur coats etc) which have a naturally higher cold res.
Adding temperatures in sounds like a LOT of work though.

Somehow I think being frozen would be a death sentence
...and then again this is IVAN.

Oh, that's very good to know. I was thinking what with the LIVAN dragon tower's up staircase sending you back to the worldmap that this was going to be a big issue.
How does everyone feel about having floating platforms (rooms) further up the tower and more solid foundations on the first couple of floors?
Could work similar to how IVANT's special UT level does. Although we would have to work out an easier method to invoke levitation - I had a look to see if I could just make a potion that induces levitation status temporarily, but alas there doesn't seem to be an EFFECT_LEVITATION, only levitation as a state so that rules out the easy way forward.