Mark Wahlberg is in Taylor, Texas with his scenes for Transformers 4 officially underway. The actor was seen being directed by Michael Bay, alongside an old beat-up blue Chevrolet truck serving as Wahlberg's vehicle of choice (are we seeing a new Autobot?). Also on set is the faded husk of what appears to be Optimus Prime. Has the robot leader really let himself go this much since Transformers: Dark of the Moon? Check out the latest as production continues on this awaited franchise sequel, which promises to breath new life into the long-standing series.