10. The clipping sphere¶
The clipping sphere allows a user to only render some part of a 3D scene. Imagine that you made some changes and want to check how these changes influenced a particular object. Instead of rendering the entire scene, you can place a clipping sphere around the object and only render that part. In the image below we present what a rendered result looks like with a clipping sphere. This is the PresenZ equivalent of doing a cropped render in 2D.
The inverse is also possible, to render everything outside of the sphere creating a hole in the final render. For instance, if you are rendering an animation and a large part of the scene is completely static and not influenced at all by the animation (shadows and reflections), this part could be rendered once with this technique.