Rock N Roll The Ask. Genlock cameras to the video projected on screens in front of and around the car for mapping car driving scenes. What I did. Genlocked projectors to 23.98 FPS and Install projectors on rolling platforms so they could be moved as needed per shot. How I did it. Placed projectors behind and in front of projections screens as needed to map video on to the car or to simulate driving. What I used to do it. Barco 30k Projectors, Folsom Image Pros and Evertz for Genlock