Page not Found Custom Rendering "Forward Rendering process"

It looks like whoever added that link either intended to write about it or did and deleted the content.

However there is this forum post by @nehon explains some things.

and this
https://jmonkeyengine.github.io/wiki/jme3/advanced/post-processor_water.html#how-did-we-implement-it-in-jme3
and this from one of jmonkeys developers,

The last link might of been what was intended for that page but I’m guessing here.

and lastly, someone from the core team would have to update what’s going on now with forward rendering and jme because this page was from 2012 or so.

An eternity in graphics advancement.