<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Dear Gmsh users,<br><br>I have defined several volumes and surface loops and I call the `Mesh 3;' command to generate a 3D mesh. Can someone please clarify:<br>a) does `Mesh 3' account for all volumes currently in memory or only the last defined?.<br>b) if it accounts for all volumes in memory, what happens if some of these volumes overlap?. Should I delete/hide overlapping volumes and mesh them separately?.<br><br>Thanks,<br>Mike.<br></td></tr></table><br>