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@ -72,3 +72,5 @@ This is extremely fast, however there are a few disadvantages:
4) As visibility is determined from a cell (with volume), the results cannot be as accurate as visibility determined from a single camera viewpoint 4) As visibility is determined from a cell (with volume), the results cannot be as accurate as visibility determined from a single camera viewpoint
5) Without modification it can only give quite approximate culling of dynamic objects (similar problem to (4)) 5) Without modification it can only give quite approximate culling of dynamic objects (similar problem to (4))
# How does LPortal calculate visibility?
LPortal, as the name implies, is a geometrical solution using rooms and portals. At present it is calculated at runtime but I am planning to add optional PVS (this is unlikely to make a significant difference in most cases, as LPortal is very efficient at runtime).