user29959: 
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?

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?

user4426: 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): 



29959: <p><a href="https://i.stack.imgur.com/etdZy.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/etdZy.jpg" alt="enter image description here"></a></p>

<p>This is a picture of a green field that changes into a hill.</p>

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

<p><a href="https://i.stack.imgur.com/HKmR0.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HKmR0.jpg" alt="enter image description here"></a></p>

<p>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?</p>
 4426: <p>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): <div class="youtube-embed"><div>
                <iframe width="640px" height="395px" src="https://www.youtube.com/embed/AiVGeoJsAtQ?start=265"></iframe>
            </div></div></p>
