White Backdrop
can you make a white background behind you without a green screen in after effects?
well, i have a white backdrop with a stand, but i have no lighting. i was wondering is there a good way in adobe after effects to brighten the background more white without changing the persons colour? thanks everyone........
A green screen really would have been preferable, but this is not impossible to work around.
I have 4 answers to your question, I will list them in order of the amount of frustration you will experience while doing them.
1. SUPER FRUSTRATING "*****/5"
Mask your subject out then insert a white solid behind them. OR Mask your subject out then duplicate the original layer and color correct it so it is brighter
HOW TO CREATE A MASK: http://help.adobe.com/en_US/AfterEffects/9.0/WS37445DB7-352A-42e9-BACB-EB40BD421524a.html
Be warned! If you attempt to mask out a person, you WILL pull your hair out. People are complex shapes and have unpredictable movements. This process will amount to you drawing an outline around your subject for EVERY SINGLE FRAME OF VIDEO! Having forgotten a green screen before, I know the horrors of hand masking a person. It took 4 hours and I only accomplished 10 seconds of video. It's there if you reeeeaaaally feel the need, but I'm warning you! just don't do it!
2. POTENTIALLY FRUSTRATING "***/5"
Turn the white background into a "green" screen use the keying effects in after effects. Once the background is gone, replace it with a correctly brightened .jpg or even a solid layer.
Watch minutes 3 through 6 of this tutorial to learn how to accomplish a perfect green screen effect: http://www.videocopilot.net/tutorials/advanced_car_hit/
The reason this could be potentially frustrating is that white is a much more common color than green. In other words, not only will your background disappear, but your subject's eyes may also be gone. A trick I've learned to avoid things like this is to: duplicate the original video layer then keyframe a simple square mask around the eyes. This makes the eyes layer unaffected by the keying effects. Making a square follow someones approximate eye position is much easier than masking an entire body. You could even use tracking if you want to get fancy. But that technique is for another question.
3. KINDA INCONVENIENT "**/5"
Re-shoot with a green screen. 
4. RELAXING "*/5"
Duplicate and mix.
Duplicate your video layer. Make the new layer black an white. Set the blending mode to "overlay" and adjust the opacity / brightness and contrast until you have something that looks alright. Maybe even try a different blending mode if your feeling adventurous. This solution takes a lot of tinkering and knowledge of blending to get a good result but is rather simple.
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The best result might be a mix of one of the above 4 answers. Good luck!
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Lighting a White Background
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