<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi Gary,<div class=""><br class=""></div><div class=""> Good to hear from you. The hide dust feature does not change the density map, it only hides the small connected surface pieces. You could set the map grid points to zero inside the dust blobs with the mask command. But first you need to be able to show only the dust and there is no command to do that. I've attached a Python script that does that. You select the map surface (ctrl-click) that you have done hide dust on, then open the surfinvert.py script to show only the dust. Then use the mask command</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>mask #0 sel invert true</div><div class=""><br class=""></div><div class="">to mask the density map (#0) to the selected surface (dust blobs only shown) and invert, since you want to keep everything outside the dust blobs, not everything inside the dust blobs. I tried it, works. But if you lower the threshold on the new map then of course you see more dust.</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>Tom</div><div class=""><br class=""></div><div class=""></div></body></html>