Who knows how to create dimensions for interiors like in GTA Online and GTA SAMP?
Dimensions for interiors? Do you mean faking interior’s through the likes of windows? Have a look at Unreal 4 Materials 11 Windows with fake interiors (Bump Offset) - YouTube for this effect. Dave runs a great tutorial on Parallax shaders
I meant that the players are in the same interior but do not see each other.