Nearly six decades after France's prehistoric Lascaux caves were made off-limits, visitors will be once again be able to tour the site - only this time in virtual reality.

France will trial "empathy machines," which use virtual reality technology, from October, per rfi.; 30 male volunteers — all convicted of domestic violence — will take part in the experiment.

The new technique may one day create online maps that offer viewers a virtual reality experience. The software could build cities for video games automatically, instead of doing so by hand.