External Render Plugins with Blender

Ok, someone explain to me how to integrate Blender nd external plugins like POVray, and YAFRT, etc.

Is there something like MTOR in Renderman which acts like a bridge or anything? How does it work?

Povray is not a plugin. It is a separate renderer to make ray-traced
images. If you are interested in using it with your blender models
you have to use a python script to export them …
More details on the url here below.

ahh

ok…many thanks