I've loaded a new version of Wall Worm Tools tonight. In these is a repackaged tool that I'm now naming Anvil (as a play on Hammer). It is the evolution of the Displacement Tool but since it's evolving past just displacements, I needed a new name.
OK... so here is where it stands. It now has a full-featured VMF exporter*. The asterisk is because I have not yet figured out how to translate UVW mapping of faces into the format needed for VMF brush sides (the same dilemma that's been around in the displacements for a while). I'm getting closer to a solution but still struggling. Several people have been helping me look into it.
So here are some of the really cool things about this new VMF exporter barring the UVW dilemma:
3D Skyboxes can be designed as extensions of your scene/level at full scale and along with your level. It means that you don't have to wait until all the level is designed before moving to the skybox and rescaling, etc. All you do is tag the skybox items as belonging to the skybox with the Skybox Add button.
The exporter will export brush geometry. Simply tag the brush objects with the Brush Add button.
Convexity point and brush entities get exported.
All WW models.
Skywriter Sky.
Also... the exporter will collect any of these valid objects from XRef Scenes in the current scene.
ANyway, even without UVW on brushes, you may find this a convenient way of getting your level and models into Hammer. As soon as the UVW is finished, there will be even less reason to use Hammer. And I've been petitioning Maple3D to add entity input/output. If added... you may never see me open Hammer again!