‘Ash’ Review: Deep-Space Horrors. In this sleek film by Flying Lotus, ... Ash Rated R for bloody violence, gore and language. Running time: 1 hour 35 minutes. In theaters. Ash.

Eiza González plays the lone survivor of a deep-space bloodbath in 'Ash,' which saves its boldest ideas for your eyeballs, not its recycled script.

To see how deep the ash was, the group improvised a ruler using a long, T-shaped metal rod that the clawed arm of the ROV could hold and added colored markers every 7.6 centimeters (3 inches).

They found that the ash was up to 1.5 meters (5 feet) deep at the sites closest to the volcano. And even 96 kilometers (60 miles) away, the ash at one site was still nearly 0.5 meter (2 feet) deep.