Nika Ragua demonstrates how you can convert weight map information in Softimage to geometry using ICE, and also covers using the raycast node and creating simple topology manipulations in ICE.
How to convert weightmap to geometry in softimage ICE tutorial covering raycast node and simple topology manipulations
By raycasting from each vertex you are able to use the returned raycast information to determine the parts of the mesh to manipulate. Nika makes the tutorial Softimage ICE raycast to topology available for download here.