If you're interested in the process of filmmaking and the process of making Christian film, you should really take a look at the article, Why Do Heathens Make the Best Christian Films? by Thom Parham. It's not entirely filled with new observations, but it's food for thought and worth a read. It does make you think about what makes a Christian film. Does a Christian theme (such as forgiveness, mercy, justice) make a Christian film? Or is there something deeper at work? Does a Christian film need to have an explicit Gospel message? Can you have a God-glorifying story without ever mentioning the name of God?
Examine your suppositions. Think about what God is calling us to.
