Tips For Shooting On Green Screen
Green screens give filmmakers the freedom to get really creative with their scenes, and the possibilities of what can be achieved with a green screen are endless. As wonderful as they are for creating enchanting footage and amazing effects, green screens aren’t always the easiest things to shoot on, and there are a few things to bear in mind when using a green screen for your video creation. Never underestimate the important of pre-production when shooting with a green screen. It is easy to forget some essential steps and lose sight of what is really important in the midst of the chaos of a green screen shot, and when this happens your final footage can end up being compromised. Here are our top tips for shooting on green screen:
When using a green screen, you will want to cast lights on it as evenly as possible. Even lighting will give you a nice bright green that will help you set the background apart from the foreground elements. In addition to this, having an evenly lit surface makes keying easier in post-production as you will not need to try to key a wide range of green shades. The less even your green screen is, the more you will have to expand the range on your key. This can lead to accidentally keying out things that you should be keeping in shot, or vice versa.
When you have got your green screen with a good flat lighting setup, you can then start lighting for the foreground elements. Light the props and actors separately from the green screen to make them stand out. Keep in mind what the replacement background is going to be and light accordingly. If your recreating a bright, sunny day then light your foreground for that effect.
You will need to decide if you want to shoot using a green or blue screen. Although we refer to them as a "green screen," it is not uncommon to shoot on blue in certain situations. Green screens are usually used more often and do a good job in most situations. However, if you want to shoot something with a large amount of green in it, like green clothing or plants or leaves in the foreground, then you might want to think about shooting on blue screen instead. Think about everything that will be in the shot and decide if a blue or green screen is best for your footage.
Most of the time a green screen is hung using a green fabric material and it is absolutely essential that you pull the screen tight on all sides. This is in order to avoid creases or folds in your screen. Folds will create uneven lighting and shadows that will wreak havoc when it comes to keying the green in post-production. Bear this in mind for any other green elements you might have in shot as well, such as a green screen suit or green fabric draped over a table or chair.
Try to keep your green screen andyour foreground elements seperated as much as possible. A good thing to remember is to position your foreground elements at least ten feet away from your green screen at all times. This will help to remove shadows cast on the green screen. Just like folds and creases in the green screen, shadows will cause big problems during post production. Separating your foreground props and actors from the screen will also help to eliminate any spill. Spill is when some of the green light from screen bounces onto the elements in the shot, giving them a soft green glow that can cause issues when keying.