11 Common Blue Screen Problems
Blue screen problems are a common thing these days. Photographers frequently use blue screen techniques in their work. Let’s see some common aspects that can create problems.
1. Similar Colors
Whenever you are deciding to use a blue screen technique, you must make sure that the foreground color is not the same as the background color. If these two match, then the blue screen effect will be very problematic, causing the object in the foreground to “disappear.”
2. Foreground Color
It is important to pick the right foreground color in order to perform editing actions. The color must be a simple RGB choice, so that eventual color spills on the blue screen can be easy to remove.
3. Collective Lighting
You do not need to use collective lighting on a blue screen. Lighting both object/foreground and background will only make the final output look unrealistic and distorted, and affect the object’s appearance. The key is to light the blue screen evenly and the object individually.
Another blue screen problem is shadow marks. Shadow ripples can distort the background and create unaesthetic marks on the final image. You must stretch the blue screen tight and avoid screen shadows and ripples.
Another common problem is the perspective. The object in the foreground may look bigger or smaller compared to the background. It is important to adjust the perspective and match it to the background footage.
6. Light Matching
It is important to adjust the light with the background footage, to make it look realistic. If the object in the foreground is overly exposed to light compared to a darker background, the effects will look fake. And vice versa, if the background is lighter than the foreground, it will also look fake.
There is a certain distance required when using blue screen techniques. You must adjust the distance according to the effects you want to add. You can make the object in the foreground look taller, bigger, smaller, thinner, etc., compared to the background.
8. Chroma Keys Material
Chroma Keys are one-channel color keys that help you produce the blue/green screen effect. The material from which background Chroma Keys are made is very important, because it can improve or alter your background.
9. Object Position
It is important that you position the object in the foreground in the middle of the blue screen background. This way you avoid light differences and unwanted effects. Most people forget to do that.
The bigger the size of the blue screen, the harder it is to avoid or repair unwanted effects that may appear during filming or shooting. It is better to remove them naturally or prevent them than to digitally remove them.
11. Backdrop Spills
Another blue screen problem is the backdrop spill that forms on the background. You can reduce it digitally by using professional software or manually by keeping the object a few steps away from the background.