“3D Render Add-on” relates to realistic performance of jobs. You should have setup of 1992 Enterprise version 11 (1992 Enterprise Kitchen or 1992 Enterprise Bath or 1992 Enterprise Full).
“3D Render Add-on” relates to convert job into realistic performance within few minutes, without doing more settings to lights. The time of the result depends on graphic cards in relation to operating system.
3D Rendering Add-on relates to “1 licence”. You purchase it once and the license belongs to you.