During filming breaks of Aliens vs Predator : Requiem , the brothers supervised visual effects on Fantastic Four : Rise of the Silver Surfer .
During filming breaks , the brothers supervised visual effects work on 300 , Shooter and The Invasion by using in-house supervisors and a system called Mavis and Lucy , which let the brothers track , view and approve dailies .
Aliens vs. Predator-COLON- Requiem