In “roto” we can layer the background and differentiate between different colors to bring out the dynamics of the character in a better way.
In this nuke lesson, we learned how to use bezier curves and b-splines to draw roto shapes. Although the process can be a bit lengthy, I have gained many unique insights into roto after this training. First of all, the use of tools is very important, I think when roto character head should use more smooth curve such as Bezier curve. At the same time, reduce the number of points, which can greatly reduce the workload in the process of completion. Secondly, in the process of roto legs and hands, use b-spline to draw, which can more accurately summarize the shape and dynamics of the character.

Add roto:
1. the running man partition for roto, so as to facilitate the future tracking
2. add “copy” a connected roto area, b connected to the background
3. for the “roto” area to add color mask (mattecheck)

Use roto’s layers with automatic tracking