Originally Posted by zoubein
I got this tip from Bobo once it worked quite well for my project.
You could add a Magma modifier to each PRT Loader and set a custom channel (e.g. Mapping2) to the color you want. Then in the Render Elements, create a Custom Render Element and connect its output to inputChannel Mapping2. This will give you the color set in the PRT Loader's Magma written to a render element. There is no other way to determine what object a particle came from, you have to tag them within the PRT Loader itself using Magma...
When i use this method i reciev solid color in render element. But i need element contain beauty pass for prt loader. Its can get with magma?