Visualization is a skill that can be trained. Close your eyes for a few minutes a day and visualize and mentally "reward" yourself during the brief glimpses when the visualization is hyperreal. Eventually you can tap into it easier. It's very close imo to lucid dreaming. An easy way to help kickstart it is move around in 3D space in the imagining. Sometimes interesting stuff happens like if you are visualizing a fireplace you will suddenly feel a bunch of heat as though a fire were in front of you.