It works best for scenes that use back-lighting conditions.
You can download the effect here: PowerShader v3.2 Some things you need to know about the effect There are few little tricks to get the most out of it and these are easy to figure out. Known as PowerShader, this effect is ideal for bright daylight outdoor scenes. There is a MME shader available that can do some of the things that Ray-MMD can do but it is much easier to use.