One major problem we have faced is our original "Ken" let us down by not turning up to filming sessions and didn't respond to emails, text messages and phone calls. Lukily we managed to find another actor to be "Ken", who we thought was better at interacting with the other characters and more confident in front of the camera. Due to the fact we had already spent some time filming the original Ken, having to refilm the same footage, with another Ken, affected our time schedule and meant we were behind. We used lunch times and free periods during college to catch up the time missed.
Whilst using the blue screen, we have experienced problems like there being blue inbetween hair when there is a lot of movement within the hair. At this level getting blue screen perfect is difficult because of the halo effect, but we think we have done well enough without it being a significant problem.