Hi there,
I created trimesh for hammer 3.5. It is another type of solid which is perfert for creating terrain.
This is how it looks like in hammer:
And ingame:
It is a replacement for wedge, so you can find it in solids menu between block and cylinder. Faces parameter defines how many splits will be made on each side - for faces=4 a trimesh 4x4 will be created with total of 32 faces (2 triangles for each square).
Editing trimesh with vertex tool is way easier than editing bunch of tetrahedrons. (Only limitation i know - you can't snap or create new vertices)
Under trimesh one extra vertex is created - it defines point from trimesh brushes will be created (after compiling / saving to .map):
If you move it too close to trimesh, compilation will fail because of this (twisted tetrahedrons):
Installation is easy - just backup your hammer.exe and copy files from hammer_trimesh.zip.
(hammer.exe in archive is already modified by vluzacn's float point coord and 8196 grid enablers)
http://backup.tvorbamap.cz/archiv/hammer_trimesh.zipDisclaimer:
this is exprimental, use at your own risk
all credits for float point coords and 8196 grid belongs to vluzacnn