Ogre 3D Visibility Advice

Question

I would like an advice about some real-time rendering optimization. I'm rendering a BSP level, by only using the mesh, textures, entities, and lightmaps, not using VIS at all.

I'm trying to make my own Cell/Portal rendering system, a very basic one, but here is the problem, since Ogre uses a basic frustum culling (as I've heard), I think it would render everything behind the walls if every portals are in the field of view :

Do you have some better ideas to implement this ?

I am getting 650 FPS at a resolution of 1920x1080 if I render only zone only. I can get 1300 FPS if I see nothing.

Is 300 FPS good for a complex scene like this one?

I would like to make a lot of basic things clear for me.

Answer 1

Ogre3D actually comes with a scenemanager called PCZSM, the Portal Connected Zone Scene Manager, which is meant exactly for the purpose of portal-based occlusion culling. It should fit very well with your project. My usage experience is that it's very robust, although documentation is sparse - mostly it's in the form of forum posts.