CULVER CITY, Calif. — It is easily Hollywood’s hottest start-up.

Steven Spielberg was an early investor. So were 21st Century Fox, Metro-Goldwyn-Mayer and Warner Bros. The venture’s leadership team includes the former chief of Disney’s theme park design division; the producer of the “Men in Black” movie series; and a live event kingpin.

And now AMC Entertainment, the world’s largest theater chain, has invested $20 million in the fledgling company and agreed to finance the rapid rollout of its product in the United States and Britain.

The fuss is over Dreamscape Immersive, which has been working in a warehouse here for the last year and a half on what it calls a “virtual-reality multiplex.” Instead of a variety of movies, Dreamscape Immersive locations will offer a variety of virtual-reality experiences. Its technology, developed by a Swiss motion-capture firm, allows up to six people to explore a virtual-reality environment at once, seeing fully rendered avatars of one another.

“We were mesmerized by what we saw,” said Adam Aron, chief executive of AMC Entertainment. “Their vision is to change what V.R. has been — away from just a heightened level of video game and toward cinematic storytelling — and we think it’s what consumers have been waiting for.”