How do you make the impossible possible ? Speeding through the forest on bikes ,making a car go underwater, make a game of football appear on the moon or even the TV weather forecaster standing in front of the animated weather systems.Well,all of it is illusion created by effects known as green screen or Chroma key software.This program allows you incredible artistic control to put subjects in totally imaginary situations but for it to appear totally real.
One of the common mistakes we see in developing believable shots, no matter what the type is with the lighting. With the new program suites and technologies that companies are releasing, managing the technical aspects of lifting the person and placing them into a new background has become an easy task. So we find ourselves at a place where taking a great shot is less about technical know how, and more about an eye for detail, layout and lighting.
The good thing is, if you’re shooting your own special effects, there are some obvious steps you can take to ensure it works with yourphotos. These are things you should do every time we pick up the camera, and they’ve saved more than one shot in the end.For a photography project that requires shooting the subject against a green, blue or chroma-key background, you should remember that it takes more than good lighting to avoid having your shots look set up.
Green/blue screen or chroma key software are each preferred for different types of shots.
1.Begin with the end: Before you even shoot a picture, think ahead about what the background of your project will look like, you should also be able to choose the appropriate camera height and lens that would ensure your footage edits well. The more planning and thought you have at the start, the more professional your work will be at the end.
2.Stay away from the background: Position your subject at least 8 feet away from the background . This will reduce your spill and if you’re using a longer lens, it will also help separate the subject from the chroma key, which will give you a clear edge. Often the background color reflects onto the subject creating a slight blue tinge around the edges. This is known as blue spill. It doesn’t look nearly as bad as green spill, which one would get from green.
3.Always check the screen is lit evenly with no shade areas or shadows and that includes the floor for full length shots.
4. Have a script to work with,this will eliminate errorswhen a shot or which prop is used when.Remember KISS.
5.Your subject should not be wearing anything the same color as the screen, green/blue depending on the background color,or parts of them will be invisible.
6.Ensure your green/blue screen is evenly lit. Any shadows can cause discoloration and stripes, which is not good.
7.Ensure the camera is not on “Auto White Balance”. Set it to manual and hold a piece of paper up to the lens so it can analyze the white balance with the light conditions in the room.
Be creative! Remember, with Chroma key equipment you can stand on a blue/green thing, and make it look like you’re flying!
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