limit rendering to visible ara only

[rogerdv]

Im trying to find the right way to do this. I have a simple map (flat tiles or boxes) that I render to an scene. The problem is how to limit the rendering to only the visible nodes, or to an specific section of the scene. The problem is that although the map is just 32x32, it is really slow to rotate it.
I tried using octrees, but it didnt optimized rendering.