Rendertime Displacement for Position Displace Op

[AndyMurdock]

I use Position Displace Op a lot. It works well for a displacement with a uvw mapped object, but what about when the displacement map is more complicated. 
I also use a great deal of VRay triplaner mapped displacement and the VRay Blend Material that mix different displacement maps. There we have displacement only happening at render time. 
I'm hoping for a way to find that render time displacement and give it the Position Displace Op. 

Thanks 
Andy

[tyFlow]

tyFlow is only able to read data that texmaps feed to it using Max's regular API. It can't access data that a renderer generates internally (like the special VRay maps), unfortunately.