1

enter image description here

This is a picture of a green field that changes into a hill.

The idea is can you can have a large, organic 3D green-screen this way?

enter image description here

I used a program to normalize the darker green areas of the field using replace color and increasing the thresh hold without losing texture and wonder if this could be done to a live feed?

Improve this question

1 Answer 1

Reset to default
1

It's doable, so long as you have some time, diddling around in After Effects with the Keylight chromakey and the camera tracker... Here's an example I made a while back at 4m25,5m17, 6m04, 8m33 (and a few other sections):

Improve this answer
8
  • Ye, this looks like the same method used to mark imaginary lines on a football field.
    – Justintimeforfun
    Commented May 25, 2020 at 16:38
  • I should add - a bit of key-framed masking and possibly a little rotoscoping was also used to improve the overall key effect in some of the shots
    – tomh
    Commented May 26, 2020 at 8:58
  • Would this work in a horizontal setup? In the example the image is looking down at the grass. Ideally, in my picture the grass, also works as a back drop.
    – Justintimeforfun
    Commented May 28, 2020 at 22:04
  • So, while you can, use grass as a greenscreen, it won't make a good greenscreen. The idea with a greenscreen is to get the screen to be as uniform as possible; ideally, the whole screen would have the exact same color value at every point, and ALSO, the talent would be placed as far away from the screen as possible, to keep green light from "spilling" onto their skin/hair/clothes,etc. Standing on your screen makes this difficult. Don't expect one-click results if you use grass, and expect to do a lot of rotoscoping and cleanup. Pro screen lighting gets you closer, initially.
    – Jason Conrad
    Commented May 29, 2020 at 5:04
  • @JasonConrad what if I used a program to make it usable. I added a 2nd picture for an example.
    – Justintimeforfun
    Commented May 30, 2020 at 5:05

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.