Little trick for those nasty gaps and weird sim behavior in vellum when using attach to geometry constraints. Say you have some vellum sim and want to attach few lines/hairs to it in the second sim (using the first one as collision). There is always a small gap between attached points, and after some time I figured it was due to collisions between those points that is forcing them apart, and causing some weird motion. Easy fix is to just disable collisions on those points that are going to be attached with: `i@disableexternal = 1;` Little GIF that hopefully illustrates things better (or not).
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http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20192910/24/19/disable_collision_vellum.gif
