Hi Everyone, i am new to houdini and i am looking for a solution in vex for that trivial problem: 1. create a grid 2. store the prims in a wrangle (primid, points assigned to primnum or whatever is needed to restore the topology) 3. use an add sop to delete all prims - keep points 4. restore prims in a wrangle - voila the grid is back i allready had a look at this and tried alot whitout no luck http://www.tokeru.com/cgwiki/index.php?title=Points_and_Verts_and_Prims#Store_point_order_of_prims_via_vex unfortunately, in this example he splits the prims before he stores them - i dont want this - there must be a solution with a loop going through the shared points and generating a new Prim from that. Maybe you can push me in the right direction.. Cheers Cruzifer maybe you can push me in the right direction