<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:12pt"><div>Hi,</div><div><br></div><div>I've been wondering: would it be possible to take an unstructured grid using existing filters and make it into structured? Here's why: I compute an iso-surface for a data set (resulting surface is unstructured subset of original structured data set), which needs to be compared against the cells of the original structured grid. Specifically, I need to find out which cells of the original data set border the iso-surface, and which are inside. All filters that do appending/combination of the contour and original (structured) data set create unstructured grids.</div><div><br></div><div>Thanks, Sohail</div></div></body></html>