[Now improved] Could somebody rate my mapmodel?

[tempest]

Cullface is something completely different, you don't need that.
Just make the drop semi-transparent in the (PNG, you already seem to have that) texture. Now, set mdlalphatest to something like 0.1.

[SELECT ALL] Code:

md3load tet.md3
md3skin drop tet.png
mdlalphatest 0.1

AC's documentation leaves out on it, but Sauer has it documented: http://sauerbraten.org/docs/models.html#mdlalphatest