“Optional items” is where you can control visibility of certain parts of the model. You can arrange the sequence of the change and animate it over time.

  • First setup the initial state by toggling each parts.
  • Uncheck the “Include in sequence” toggle for parts that you wish to exclude from the animation sequence.
  • Set the sequence order for each part
  • Use the sequence slider to preview the animation
  • Use “Auto Update” options for the sequence slider to animate it

Here’s a demo using this functionality: