If aliens need only powerful computers to produce interesting qualia, this will be no different from other large scale projects, and boils down to some Dyson spheres-like objects. But we don’t know how qualia appear.
Also, a whole human industry of tourism is only producing pleasant qualia. Extrapolating, aliens will have mega-tourism: almost pristine universe, where some beings interact with nature in very intimate ways. Now it becomes similar to some observations of UFOs.
If aliens need only powerful computers to produce interesting qualia, this will be no different from other large scale projects, and boils down to some Dyson spheres-like objects. But we don’t know how qualia appear.
Also, a whole human industry of tourism is only producing pleasant qualia. Extrapolating, aliens will have mega-tourism: almost pristine universe, where some beings interact with nature in very intimate ways. Now it becomes similar to some observations of UFOs.