Can I use Antiportals in Torque?

#1 You will have to use portals and zones to manage occlusion.

#2 Thank you David!

I'm making an outdoor scene, so I guess the BSP brushes will not contribute much to rendering if no portals. And if the BSP burshes are too complex, they will hinder rendering efficiency with too many partitions.

#3 The terrain system has its own fogging and occlusion. Paged terrains (TGEA) do as well. The systems are very different than those used in Unreal.