Unity Occlusion Portals: What and How?

Posted by Nick Wiggill on Game Development See other posts from Game Development or by Nick Wiggill
Published on 2012-04-19T14:26:09Z Indexed on 2012/09/26 3:50 UTC
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3d

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algorithm

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unity

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occlusion

(Here I eat my words on Meta about posting Unity questions on Unity Answers... since that site is less responsive than this one.)

Unity provides cell-based Occlusion Culling (via Umbra, I believe). However, a newer feature that it supports is Occlusion Portals.

The question is, if BSP-based occlusion culling is already a feature of Unity, what do portals add, and how?

PS. This question is not "What are portals?" -- I'm aware of the original Quake BSP-style portals -- which is partly why I find the explicit portal concept in Unity odd, since it uses BSP anyway.

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