SKY REPLACEMENT & COLOR GRADING
Objective:
Replace the sky in the footage and adjust the color to match the original.
Technique used:
Match Moving (3D)
Luminance extraction (Alpha Matte)
Color Correction
Challenges:
The camera has a rotational motion
Original Footage
I used camera tracker node to track the footage then i created a scene
Transitioning to the extraction of the Alpha Matte, the recommended approach involves employing a "Keyer" node equipped with a luminance slider. Adjusting these sliders allows for the extraction of the alpha matte, wherein sky pixels appear as black and other pixels appear as white.
Then I added a "premult" to multiply the alpha matte and the RGB in the footage.
Next step is to "merge" the 3D Scene with the replacement sky image and then i added a color grade node to match the colors of the footage
Before and After
