If you are looking for portal 2 moving portals, check the results below :
Portals on Moving Surfaces – Valve Developer Community
https://developer.valvesoftware.com/wiki/Portals_on_Moving_Surfaces
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In order to allow portals to remain on moving surfaces set the “sv_allow_mobile_portals” console variable to 1. Use a point_servercommand to …
Can Portals Move? [Portal 2 Analysis] : Portal – Reddit
Can Portals Move? [Portal 2 Analysis] from Portal
More results from www.reddit.com
Where can you place a portal on a moving surface in Portal 2 …
https://gaming.stackexchange.com/questions/21179/where-can-you-place-a-portal-on-a-moving-surface-in-portal-2
Chapter 5 – Area 3