I'm currently working on making 3-d terrain and map pieces. Being new to the game and only owning the little tiny maps that came with Street Fighter, I'm curious as to whether there is a general guideline and pattern that official Heroclix maps follow.

Ie. 16x24 maps usually have 12 square of worth hindering terrain, 6 square of blocking, 18 elevated. Never more than a 8x8 space that is open/clear space.

Any insight will be greatly appreciated.

No, there's no such "requirement" or formula. It wouldn't be fair to create such mandatory guidelines because each map is an area unto itself. For example, the WoS "Bridge" meant a bypass in the middle of water (though some such as myself feel the bridge should have been completely elevated terrain). On the other hand, The Great Arena is just that...wide open, while The Baxter Building is an indoor office building and thus has a plethora of walls.

It all comes down to the type of location you're creating.

It's your thing. Do what you want to do.

I've made several 3-D maps in the past. I was working at a venue at the time, and was trying to make something dynamic that might attract potential new players. I'd make the various buildings into locales from movies or TV, like the Bada-Bing! strip club from The Sopranos, Quick Stop/RST Video from Clerks, The Hall of Justice from Super Friends, etc.