I'd just browsed to DA and there was the tumbnail. Knew instantly it was you before I'd even clicked for a larger image.
The collision tool is fantastic. So basically it detects where two surfaces collide, and you set the parameters to say which surface would yeild to the other and by how much- so one surface would leave an impression in the other- imagine someone jamming their finger into your cheek. To apply the smoothing modifier, select the figure you want to yeild, go to EDIT/FIGURE/GEOMETRY/APPLY SMOOTHING MODIFIER. Then in your parameters tab for that character, you can select ONE other object for it to collide with, and how much resistance it has (Collision Iterations)- if you want multiple objects colliding, you have to keep applying the modifier, exporting as obj, re-importing etc OR creating a series of morph dials.
Examples: Character lying on a bed- the bed molds around the characters form. Two figures holding hand, one hand gets displaced by the other.
There is a good tut here but it's in French www.youtube.com/watch?v=k57EhD…