danasay
 lvl.3
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Aloha Cetaman,
Thanks for the compliment.
"Day for night" color grading has been around for as long as movies have been around. Typically, it is used in areas that are too large to properly illuminate with night simulation lighting. I was inspired to try it, from tutorials on YT. For me, it is a manual process (after primary white balance, add blue gain and blue gamma and lower the gain, saturation, etc.). However, you could use a LUT or just save a graded clip for future uses (middle click).
Sky replacement is the trickier part. Consistent camera direction during recording, compatible sky choice with matching sun direction. Qualifier tools are usually the most difficult if the initial sky to be replaced has overlapping hue, sat, and lum. Power windows eliminate some of the overlap. I used many manual keyframes for zoom and position of the new sky layer, in order to keep the sky aligned with the distant objects. The sky alignment can be maintained by the tracker if conditions are suitable.
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Captain
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