A Garry's Mod / sandbox system

Seems wonderful so far! Now add some facial vertex animations so we can has faces like this :3

That would be epic, but sadly hard to do in Xonotic. People would need to add additional bones to the faces of most characters... which wouldn't be the hardest part either, as then we'd need to either animate all facial expressions (in which case Xonotic would need animation blending) or make bones possible to pose from in-game (which is already planned).

Anyway, I worked more on the sandbox today, and did some nice things. I added particles to material collisions, as well as support for object-to-object attachments. You can mark an object for attachment, then select another object to attach it to. Note that objects cannot be edited while attached, but can be detached and put back again. Attaching to bones is also supported.