Rotoscoping the sky out

ProfessorChaos

ProfessorChaos

Active member
Hey, I've got some day footage that I'd like to turn into night footage...Can someone guide me through the process of rotoscoping the sky out frame by frame because the sky is not like a green/blue scr where it can be keyed out...

i know it involved masks ...now..how do you do it..

i read this thread already

http://www.dvxuser.com/V3/showthread.php?t=43068

and it explains the gist of it...i will post a clip of the footage asap(later today) and the footage has the sky and some trees in the way so that will be a painstaking process.
 
surf said:
well I would do colour correction. even I would add a bit replace color.
Click to expand...

ya but it looks really really fake because when i try to CC it....the contrast just gets ramped up and the white is bright and buildings are dark

and if i decrease the white levels...it just becomes like greyish video. because I've got some nice street lighting from buildings and christmas light and all the detail gets washed out in that footage...ccing for the other clips in the scene work out fine.
 
Have you tried a day-for-night filter? There are a lot of them out there and they work with varying degrees of acceptability... some good, some not so good. Magic Bullet has one (long render), and so does Nattress.
 
another way:
use 2 layers, and put the same clip on the layers. then change the uppers filling method. the multiply worked for me quite well, but it also depends on the clip.
 
Avoid roto at all costs...last resort...

Is the shot static? If it is it wouldn't be too hard to roto it out, especially if the shot consists of buildings with hard edges seperating them from the sky. You can use the Pen tool to draw a mask and then comp in your new sky.
 
Avoid roto at all costs...last resort...

Is the shot static? If it is it wouldn't be too hard to roto it out, especially if the shot consists of buildings with hard edges seperating them from the sky. You can use the Pen tool to draw a mask and then comp in your new sky.
 
use the rotobezier to cut it out then layer it with the night sky or you could apply vector paint and erase every frame of the sky and layer it with the night one. hope that helps
 
Why anyone would want to Rotoscope a sky out when you are trying to change the color of it I will never know. There are a million in one filters to help you with this problem, rotoscoping should NEVER and I mean NEVER happen unless you are trying to cut someone and/or thing out of your footage. Post a still of your project for us to give you a better opinion.
 
depends wat you use it for, its foolish to say taht it shouldnt be used because u can get some interesting results.
 
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