Is there a way for yt to say, to remove a certain cells from an 3D object, say removing a small sphere from a big sphere or cube? I guess cut_region() isn't the one. From G.S. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.spacepope.org/pipermail/yt-users-spacepope.org/attachments/20120531/730b713a/attachment.htm>