Semi-Transparent Keying

Posted by on Sep 19, 2011 in Blog | 8 comments

soft_key

I’ve been experimenting with some advanced chroma keying methods to specifically deal with reflections and subtle details like this car plate.

Often times we use keylight to get rid of everything that is green but in some cases we want to keep some of the reflections to make a shot more realistic.  Some of these tips are quite noteworthy because the footage being used is from a Canon 5D which can be particularly noisy due to compression artifacts.  Pulling a good key is already challenging enough but leaving in small details without flicker is even more problematic.  I think I have figured out a few good methods and we even filmed another behind the scenes video to show how we setup the shots. Look for the video and tutorial soon.

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8 Comments

  1. wow, you are really so generous sharing all this tips with us…

  2. Looking forward to it!!

  3. Good job. We are waiting

  4. Simply awesome.
    Just one question, if you change the angle, and the camera´s lens is reflected, could you still apply this same technique?
    Saludes desde Honduras y muchas bendiciones.(Greetings from Honduras and many blessings)

  5. this will be very helpful. i’ve tried this numerous times. looking forward to this.

  6. This is definitely helpful. I’m working on something similar which requires a tear from someone’s eye to roll down their face and freeze. To shoot it I got a face mask used in theatre and painted it green. I then dripped water onto the eye and tilted the mask so it dripped. I would then composite this onto the actors face. Keying wasn’t so bad but it practically leaves nothing behind as water is clear.

  7. Linear Color Key!!!!

  8. Now that is impressive! I can’t wait