Procedural Animation - Cauldron

Path of the scene: [01_procedural/b_billboards]
This code display a scene in loading some external .obj meshes: A cauldron and a spoon
A set of particles (one displayed as sphere, and the other using a semi-transparent textured mapped onto a quad) are emited regularily.
> Modify the code to model a scene similar to the following one.

[Interactive view]