v0.15.1 — the model follows the slider

The model only rebuilt when you let go of the slider. The rebuild was kicked from EditorApplication.update, and dragging an IMGUI control runs a drag loop that starves the editor tick — so nothing started until the drag ended. The bake was never the problem: it measures 20–140 ms end to end. It just wasn't being asked for until too late. OnGUI now kicks a pending rebuild too.

Camera damping was frame-rate dependent, and the editor isn't 60fps. A fixed fraction per editor tick made a glide that ran for as long as the ticks took, which read as the whole preview having got slower. Now exponential smoothing against real elapsed time, settling in about a sixth of a second whatever the tick rate.