This is only a suggestion but AMD are working on and implementing a free physically accurate rendering Engine called "Radeon ProRender" that will work on GPU and CPU and is already up and running on a number of packages and in the beta stage with Blender. From what I have seen so far it looks like being one of the best free rendering engines out there at present and would be ideal if Moi V4 could utilize it also.

Here is a link to one of many articles on AMD's "Radeon ProRender".
http://developer.amd.com/tools-and-sdks/graphics-development/radeonpro/radeon-prorender-technology/