Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for providing a view of a three-dimensional computer animation model, the view including one or more objects, wherein each of the one or more objects is associated with a respective animation setting for adjusting a respective three-dimensional motion trajectory interpolation of the object in the computer animation model between a first and a different second key frame; receiving data describing a user interaction with a visual representation of the animation setting in the view for a first object of the one or more objects, the user interaction being an adjustment of the respective animation setting of the first object; and based on the receiving, adjusting the motion trajectory interpolation of the first object between the particular first and second key frames.