In Spidersilk the novel, the main character, Mark, often engages in ludic dreaming. This form of dreaming allows you to lift out of your body and experience new things, including, in Mark’s case, dimension travel. For centuries, some people in our own reality have been able to partake in lucid dreaming, while others only dream of wielding the power. Recently though, a company has brought a special machine designed to help you lucid dream. Many other companies are jumping on the band wagon too, so there’s no telling what the future may hold in this regard.

For more information on this development, check out the link:

http://nymag.com/scienceofus/2016/10/these-strange-gadgets-claim-to-teach-you-how-to-lucid-dream.html