[Suggestion] Be able to add meshes/models as properties in the particle emitter

It would be nice to be able to change the model of a particle emitter at runtime, rather than entering it ahead of time in the model rendering module


Start by locating the particle emitter and its model rendering module, then trace how the emitter's model is currently configured. Done means the model or mesh can be changed at runtime instead of only being set in advance in the model rendering module.

Written by the indexing model from the issue text.