New issue 1115: [experimental] add in keyframes for making complex camera paths with scene VR https://bitbucket.org/yt_analysis/yt/issues/1115/experimental-add-in-keyfram... Cameron Hummels: something long talked about is the possibility of doing more camera paths than simple rotation, pans, and zooms. the VR refactor YTEP lays the groundwork for a timeline object and identifying keyframes (ie camera location, focus, orientation, lens type, transfer function, etc.) along that timeline before use a continuously varying function (ie spline) to connect those keyframes into a continuous path. putting this here as a placeholder for implementing this.