Hmm, I guess that would be HexaCon 3, June 1993. Wow... that was 21 years ago... Last century even... :)
Not being the kind of person who can simply *attend* a gaming convention for the first time, I signed up to GM a game of Fantasy Hero.
Not being the sort of person who can merely run his first convention game using a battle mat, minis and a scenario. I had to create a 3D maze from scratch for the game.
:) More pics of the 3D board in use here.
There was a Friday night and a Saturday afternoon session. Both were filled with players. Many people stopped by to look at my 3D board.
All in all, it was a tremendous success.