Hi all, Just as a heads up, if you are on the development branch and have been using fields that used the field_parameter "height", this has been changed to fit better with other areas of the code and is now the field_parameter "normal". Thanks to Mike Kuhlen for fixing up our cylindrical coordinates fields! Relevant changeset: https://bitbucket.org/yt_analysis/yt/changeset/edc2b99212bd100a4357083f3f365... -Matt