Now, you are able to create post-processes and attach them to a camera. The problem is that if you manage multiple cameras in your project, then you'll have to dispose or detach post-processes in order to reattach them to a new camera. To facilitate the task, you can use the rendering pipelines. In other words, you can see a rendering pipeline as a list of post-processes, which you can attach to multiple cameras.
The steps consist on creating a pipeline reference, adding the pipeline to the scene, and attaching the pipeline to the cameras.
Create a rendering pipeline, as follows:
var pipeline = new BABYLON.PostProcessRenderPipeline( engine, // The Babylon.js engine ...