Culling and a sphere

Questions & Answers
1

I have a large sphere and alot of objects moving around it. When theese objects are behind the sphere they obviously don’t need to be rendered. When I was making maps with Radiant there were theese things called portals, but since there now is a game called f-ing PORTAL I couldn’t find anything when searching with that word. A day later I found out about “Occlusion Culling” and I played around a bit with that after reading some stuff.

This is how far i got with it:

now the objects behind the sphere are still rendered until I get reeeeally close to my sphere. That’s a start, but not my goal. I thought maybe it could work if I add a circular plane inside my sphere but that had no effect.

I really don’t understand this topic that well and I’m out of ideas in how to search for some answers. I don’t know if occlusion culling is the right way here, or if I am doing it wrong.

2

First off, don’t expect occlusion culling to be 100% perfect. Occlusion culling subdivides your scene into PVS and it could be useful to visualize the volumes to get a sense of how it works.

Secondly, moving objects need Occlusion Areas.

Try placing an Occlusion Area around your sphere.

If you haven’t already, reading everything in the manual about occlusion culling is a start. If there are phrases or topics that you don’t understand, figure out what those mean, and then read it over again.