Hi,   I am using glue constraints and the strength is sufficient but when an object collides, my wall object comes off the ground as a whole. Is it possible to tie the bottom of the wall to the Ground Plane object?   Should I group some of the primitives of the constraint network at the bottom of the wall and then set their strength to -1 in SOPs?   If I do that, it's not clear to me whether the primitives with no strength will be 0 or use the value set in DOPs?   Right now I am using Spring instead of Glue for the constraint_name and when I set the bottom primitives to -1, I get pieces exploding before the object even collides with the wall. So not sure if this is the way to go about this.     Thanks