this tutorial contains:

models/weapons/proj/lightning/tris.md2 -- from rogue . which is actually ripped
                                          from quake1, and rebuilt as an md2.
sound/weapons/tesla.wav            -- from quake1, renamed to fit te_lightning
sound/weapons/lfire.wav            -- from quake1. nuff said.
pics/w_tbolt.pcx                   -- by me, from scratch. yes its lame.
