Portals are used by Halo 2 to create separate
zones within a single level. This allows the game engine to be more
efficient in rendering assets as well as allowing unique background
sounds and sound environments in different areas.
Once a level reaches a certain size, it will
require portals due to the amount of data included in the levels
tag files. Portal planes are placed in your 3D editor and must have
the +portal material applied to the faces to be exported
properly.
Some tips for creating portals are as
follows:
·
To create a seal, portals must intersect world geometry
or other portals.
·
Portal planes can extend outside the level.
·
Portal planes can be vertical, horizontal, or angled.
·
To view portals in Sapien, use the console command
visibility_debug_1.
·
To turn off portals in Sapien, use the console command
visibility_debug 0.
