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Lighting Tips For Chromakey - Video
or Photography
First, you will want to have plenty of space to work with and
quite a few lights. Here are the 2 most common problems when
using a chromakey backdrop:
Uneven backdrop lighting
Reflected spill onto the foreground subject.
Here is how I recommend you set up your lighting.
Step 1 Light The Chromakey Backdrop:
When lighting a chromakey backdrop, you want the lighting on
the backdrop to be as evenly as possible, with no shadows.
Your backdrop lights should be behind the foreground subject.
Step 2 Light The Foreground Subject:
You will want to light the subject with its own set of lights.
You want as much separation between the foreground subject and
the chromakey backdrop as possible.
The more separation you have between the foreground subject and
the chromakey backdrop, the better.
This reduces the chance of the foreground shadows hitting the
chromakey backdrop. It will help minimizes the "blue or
green fringe" from light that is reflected off the chromakey
backdrop. (called reflective spill)
Step 3 Neutralize Any Color-Cast
To neutralize any color-cast from light reflected off the backing.
I use a soft back-light from each side to light up each side
of the foreground subject, helping to neutralizing the reflected
spill from the chromakey backdrop.
Note If you take the time to light your foreground and chromakey
backdrop correctly. No "blue or green fringe" on the
object or the persons clothing, hair or skin, then even the most
basic chromakey hardware or software will give you good results.
Rules For A Good Key
Make sure your lighting is even and well balanced on the chromakey
backdrop
Shoot with the iris of your camera at full open
Keep the subject as far forward of the chromakey backdrop as
possible
Light the subject separately
Prevent shadows from hitting the chromakey backdrop
Make sure the subject does not contain the same color as your
chromakey backdrop! |