Just wanted to say I'm really loving Trenchbroom and to thank you for all your hard work. Moving from the ancient Hexmaker editor, TB has revitalized mapping for me. The ability to select and edit multiple brushes at once is a HUGE time-saver and really makes things so much easier, not to mention the great 3D view functionality. I also find the face clone/extrude function very useful in setting up the initial arrangements of complex brush arrangements, in fact I think I actually use it more often than the brush creation tool.
Anyways, here's a imgur album of the Hexen 2 map I'm working on: https://imgur.com/a/49Bvhgs
It's getting pretty huge because of the BSP2 support I found in a custom version of uHexen2, but the use of detail brushes actually lets me do a full level 4 VIS compile in under 1 minute. O.o