Now I was able to created two new animations to shows particles models in solid, liquid or gas state. Please check out [url=http://www.phy.ntnu.edu.tw/ntnujava/viewtopic.php?p=1224]particle model for solid/liquid/gas states[/url] and [url=http://www.phy.ntnu.edu.tw/ntnujava/viewtopic.php?p=1225]particle model for solid/liquid/gas states in 3D[/url] I hope there are the animations you are looking for. Please let me know any suggestions you might have!