This week I started tracking a shot that has a really quick and rough camera move towards the end. The amount of motion blur made it so Nuke was having difficulties tracking it. I already had to split the scene into two different tracks because of the amount of rotation in the shot but I’ve had to hand track the ending in order to get the right movement. I’m still working on aligning all three tracks but each individual track seems to be working right now. I’ve also started working on the key for this shot but still need to add some holdout masks.
Pages of Destiny: Update 2
I’ve still been working on a lot of different shots for pages of destiny. I haven’t been breaking down some of the simpler shots yet but this tracking shot was a fun one I finished recently. Also I did speed up the footage a bit for the breakdown.
The track for this shot was pretty typical but I thought the way I used it to help with the roto turned out well. I took one frame from the end of the shot and painted all the markers off it. Then I rotoscoped the shape of the area with the tracking markers. I then placed this on a card in the scene to cover up the original carpet. I did have to do two separate versions of the carpet, one for the end where the carpet is up close and one for the beginning when it’s far away. For when it is far away I had to adjust the color and blur it to match the focus of the carpet. After doing this I added some noise back on top since the blur got rid of a lot of it.
Pages of Destiny: Update 1
I’m currently compositing for a large scale student film called Pages of Destiny. It’s a collaboration with multiple departments including film, production design, and visual effects. The past four weeks I’ve been working on tracking and keying multiple shots while I wait to composite the footage with the visual effects that are currently being made. I plan on making more breakdowns once I get some finished shots but here is some of the work I’ve done so far.
Keying out this green screen involved using many keys and multiple screen corrections. While the screen was a good shade of green straight ahead, the screen color on the ground did not have much green in it. The color values on the left actually had more blue in it than green. There was also lots of different shadows and hot spots t that needed to be fixed. In order to deal with these issues I changed the color space and adjusted the saturation multiple times.
The first two keylights in my script were fairly basic. For my next three keys I used a keyer to pull areas that had a difference in luminance from the background. After a few more regular keylights I adjusted the saturation and this expression b>(r+b)/2?(r+b)/2:b to take some of the blue out of the screen and used two keylights on that. This is what helped fixed the bottom left area of the screen that had more blue than green. After all that keying I rotoscoped some holdout mattes and garbage mattes.
Right now I’m just merging my keys over a light color so it’s easy to see the work that’s been done so far but as soon as I get the CG background I will update my comps.
For this shot I just need to use some keylights and a couple of primattes. I also used multiple color spaces and color corrections in order to get all of my keys.