Green screen potential in our movie

when initially planning our movie trailer we took into consideration the concept of using a green screen so that we could experiment with CGI and incorporate scenes that were perhaps impossible to film. this article was particularly useful with our research into green screening;

* we thought we could potentially use a green screen if we needed to give audiences watching the trailer abit of context behind the films trailer, for example if there was absence of much dialogue or text, then it may not be explained why the old woman in our trailer is ghostly/dead or why we wanted her to wear a gas mask whereas if we chose to green screen a graveyard background or blitz scene connoting the woman came from the post ww2 era it would give away more of what the plot revolves around*

+/- we did however look at the positives and negatives behind green screen usage and thought that possibly its CGI and visuals may not be necessary for a film we wanted to make seem as realistic and relatable to everyday life as possible. Also it may ruin enigmas, cliffhangers and questions people would have about the film in its entirety, so thought instead we could potentially advertise special effects and CGI on the film poster or magazine cover rather than revealing too much in the trailer itself. 

How to Use a Green Screen: A Beginner’s Guide to Chroma Key Photography

Chroma key photography, also known as green screen photography, is a process that allows you to replace a solid colored background with a background of your choice. This technique has been used in the film industry for years but it is now becoming very popular with photographers as well.
Using a green screen, you can capture amazing pictures that are simply not possible using conventional photo composition techniques. It also means you can spend a lot less money on expensive backgrounds for portrait photography. In many ways, green screen photography allows you to have fun taking pictures again while expanding your photography opportunities immensely. Green Screen Photography teaches you how to implement green screen photography techniques into your current photography skill set.

What You Need to Get Started

Believe it or not, green screen photography is extremely easy to do once you understand the basics. In terms of equipment, you don’t need very much. Your digital camera (hopefully you already have one of these), a computer, chroma key photography software, and a green screen background.

There are many programs that allow you to swap out your green screen with the background of your choice. Photoshop has a chroma key filter that will automatically remove the green from your image but there are also a variety of custom-made programs that are designed specifically for chroma key photography. If you would like to learn how to use Photoshop for editing your green screen photographs, check out thePhotoshop Made Easy course..

Lighting
The single most important aspect to successful green screen photography is lighting. You need uniform lighting across the entire background to quickly remove the green color from your photographs during post production.

To create the optimal lighting conditions, you practically need to have professional quality studio lighting available. Many photographers have successfully performed green screen techniques without high-end lighting systems, but processing these images with Photoshop or another chroma key program takes much longer.

Evenly lighting the background requires at least two lights. These lights should be set up as sidelights pointing toward the green screen from approximately a 45° angle. Typically, these lights should be about 6 feet away from the green screen although the material your green screen background is made of will determine the exact distance your light should be.