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The Clean Plate Process

The clean plate process in NukeX;

I imported the footage into Nuke X, and tracked each dot separately. Some dots dissapears from view when the head is turned. This was solved by tracking these frames by hand. Important to remember in order to get a stable solve, is to always have the same amount of trackers, preferably spread out pararell at the same hight.

When the track was done, I disconnected the tracker from the footage. Using Roto – clone tool, I used areas around each dot to hide it.

To make each clone follow the tracker, I draged the tracknode transform curve onto the clone’s transform curve. To offsetting them correctly I used expressions.

Some rotos were also given frame range since some of them dissapear from view.

This proved a rather time consuming process, but I am satisfyed with the result.

Ms2 Delivery

PPT Presentation & Previz for Milestone 2.

Clean plate & Base Mesh

This week I have been busy with creating a clean plate and sculpting the base mesh for the mouth and teeth. I thought I would use two separate meshes, one for the mouth, and one of the entire face for the rest of the effects, such as veins, and wounds.

I used nukeX for the clean plate. I tracked the dots separately in post and attached a rotopaint to each track using expressions. I am sure there is a smarter way to do clean plates, but since I have never tried before, this was the solution I felt most comfortable with at the moment.
A tutorial on this will be up later.

Next I have to fix the UVs, and export the mesh to Mudbox to sculpt some detail, like torn flesh and cracks. Feedback is welcome.

Obj. track test

I did a quick base-mesh of the face and matched it to the footage in maya. I put a transparent checker material on the mesh and rendered out a test to see whether the tracking has worked, the mesh stays where it should, and that nothing suspicious happens. I tried different programs for tracking, to see which would work better. For this clip, I think Match Mover worked fine.

However, I found a neat feature in PFTrack, Geometry based tacking, which I thought was worth testing! It allows for 3d geometry to be imported and matched to the footage, only using the vertices from the geometry to perform the track! no use to pin down trackers. Neat.

Green screen & Obj. tracking

The last couple of days I have been shooting the green screen shots, analyzed & converted the footage, and done the object tracking in match mover for the zombie portrait.

I did some research on how to rig and light a green screen, since I had to film the material in school, and as soon as possible. Rigging the set took the whole morning, since I wanted to find all the right lights and distances from the green screen in order to avoid green spill, shadows or over-exposure in the footage. (A professional photographer would have been handy.)
I first used a stand in, in order to see how the green screen vs. the stand in was lit, and then filmed the two persons who had volunteered to take part of my project.
After having analyzed the footage I chose two clips, one for every portrait, that have the smallest amount of motion blur and the best focus. Hopefully I will be able to deliver two portraits, but the plan is to at least deliver one. So, for now, I am focusing on the zombie portrait, and have tracked and exported the setup to Maya; I had some problems finding the right amount of trackers in order to get a good solve, but I ended up adding two trackers to his ears (apart from the before-hand put on markers) and got a pretty good result and depth. When filming, I took shots both without and with markers on the persons face, mostly because I want to try to do a cleanplate. A face-mesh is on the way, which I will match to the footage to see how the object track works out.

Square One.

zombie concept

The project plan is now done, including timeplan, research and concepts.
Document links are available here;
Project Plan
Research and concepts