Is anyone modelling sg/SAF units in computer games? For example making a map of singapore for a strategy game like Generals, or a flight sim like Falcon 4, or making 3D models of SAF vehicles like boats etc.

It seems not. I'd expected there to be people making things for a game like Arma, but then again, if you think about it, this being Singapore there really isn't anyone here who would devote that kind of time and effort to something that essentially has no material payoff (learning everything by your own initiative, making things because you want to, etc.) or little commercial application (games development here is a sad state of affairs crippled by computing geekery with no artistic support). The relatively small population also factors into this: there are very few people (if any) here who can foreseeably create high-quality models (with textures, and the whole shebang plus implemented in-game) that are on par with user-made productions in some of these mod communities. This can change in the future though.

There is a SAF mod for Op. flashpoint and a HDB map for CS. But that was years ago.