The topic of this week’s lesson is roto. Roto is the basic skill for learning nuke. When we get the material we don’t want to jump right in and do it, look at it multiple times, analyze it. Analyze the places that need roto, which can be divided into several large areas for separate operations, and which places can be solved by other methods. First arrange the general direction, don’t worry about small actions. Then, look at the action nodes of the region to be roto. roto will shake, and crucially, because your roto will keep changing positions erratically as it draws. So if you want it to be relatively stable, it’s best to draw the next key frame with as little change of position as possible based on the position of the point in the previous key frame. In addition, the general motion of large material, in fact, shaking is also good. Because the range of motion is large, it means that the movement is gone. Therefore, the small motion should be solved first. This part is also generally easier to roto. Then you can divide the areas with a large range of motion into blocks. For example, when you raise your hand, you can quickly make a fist with your fingers. Then the parts with a large range of motion can be drawn separately, which is a more efficient way. It is to set the general direction first, and then fill in the small details.
