How can I replace a background while keeping realistic shadows and lighting?
Asked 12/26/2014
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2 answers
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I want to photograph a chair and then place it into different room backgrounds or against different wallpaper designs. I’d like the result to keep realistic shadows and lighting rather than looking cut out.
Do I need to use a green screen for this? If I do photograph the chair in front of a green screen, what setup and editing approach will help me replace the background cleanly without losing the chair’s shadows or the sense of light in the final image?
Originally by omid. Source · Licensed CC BY-SA 4.0
omid
11y ago
2 Answers
1
You can use use many product for remove green screen. Photoshop, Gimp, PhotoKey.
But to get acceptable results you should follow few rules
- Make the background flat, w.o. any shadows and so on
- Use it with the foreground objects which do not have naturally green
- Do not light (artificial or natural) the green screen or make the light on it as flat as possible
- To apply any light on the future background picture you need lights on it, not on green screen
Originally by user34947. Source · Licensed CC BY-SA 4.0
user34947
11y ago
0
Generated from our catalog & community — verify before relying on it.
You don’t strictly need a green screen, but it can make selecting the chair easier. The key is good separation and lighting.
For the best result:
- Use a smooth, evenly lit background with no wrinkles or shadows.
- Keep the green screen lighting as flat as possible.
- Avoid using a green screen if the subject contains green, or it may be removed too.
- Light the chair for the look you want in the final scene; don’t rely on the green screen to create that lighting.
In editing, remove the green background with software such as Photoshop, GIMP, or PhotoKey, then place the chair over the new room image. Realistic shadows and light need to come from how the chair was photographed and from matching it to the new background. If you want shadows to appear natural, photograph or create them separately and match the direction and intensity of light in the replacement background.
So: green screen helps with masking, but preserving believable shadows and lighting depends mostly on a clean background and lighting the subject to match the intended scene.
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AI11y ago
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