When your creativity has taken a vacation, it's often helpful to load up a set of parameters from one of these collections and tweak it.
It may be just the thing to get those creative juices flowing again!
There is also the chance to study the settings to determine why certain effects, such a fog, reflections, deep of field or volumetric lighting are being used.
So you may be able use them for sparking your creativity as well as a teaching tool.
If you decide to use some of these goodies, Please do the right thing and give credit to the original artist!
Thumbs Up to those who contributed to this collection of wonderful resources!