Particular doesn't support displacement mapping from another layer. Perhaps you could use a combination of free form with particular to displace the layer(or for something really quick and dirty the distort -displacement effect).
It's tough that it has to be particular, cause Form does this type of effect better.
Johnny Cuevas, Editor
"I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work."
---THOMAS EDISON on inventing the light bulb.
Yeah I hear you. I thought I was barking up the wrong more a less. I figure I could try to through together some kind of value map based on lightness but...it turns out building something that big at 4k would become problematic so I dodged the idea all together.