Test Chamber 1 in-hammer image - The MARTI Initiative mod for Portal 2 - Mod DB
Portal Mapping [Portal] [Tutorials]
Steam Community :: Guide :: p0rtalmaster's Hammer Guide Series Part 12/19
Some Hammer-View Screenshots image - Portal Remake Mod for Portal 2 - Mod DB
Hammer Editor Extensions addon - Portal 2 - Mod DB
An interesting little detail I noticed while exploring Portal 2's maps inside the Hammer editor. This test has a chamber that can be seen below, being moved along some rails. : r/Portal
Steam Community :: Guide :: Hammer Aesthetics tutuorial for portal 2 maps
Portal 2 Hammer Tutorial for Beginners | Part 2 - YouTube