The first Hot3D was help in Singapore, in July 2010.
(unfortunately, sometimes the original site is not available anymore, but you can try the WayBack Machine)
2010 (Singapore): http://web.archive.org/web/20101011202143/http://hot3d.org/default.aspx (opens in new tab)
2012 (Melbourne, Australia): http://research.nii.ac.jp/~cheung/hot3d2012/hot3d2012.html
2013 (San Jose, CA, USA): http://web.archive.org/web/20130603040746/http://hot3d.org/
2014 (Chengdu, China)
2015 (Torino, Italy): http://web.archive.org/web/20150801171745/http://hot3d.org/
2016 (Seattle, USA):