I love UT3's particle system! Unlike the Source engine where you chose from a Very Selective collection of effects you can use in your levels. UT3 gives you FULL control to create almost anything with particles. Never see the same exact fire over and over again! yay :D
The fire room should of had dynamic shadows on the walls with a flicker effect but for some reason ingame it didn't show up. But it did in the editor hmm... And I think I will tweak the smoke from the fire a little more, its hard to see in the video.