Refresh a 3D walkthrough or previs thumbnail from its menu
Refresh Thumbnail for 3D walkthroughs and previs. Open the three-dot menu on a 3D walkthrough or previs card and choose Refresh Thumbnail to rebuild its picture from its first saved view. The card updates right away, and a message confirms it. If the file has no saved view yet, the message says so and tells you to open it and save one, since the first saved view is what becomes the thumbnail.
Thumbnails no longer fall back to an empty placeholder. When a walkthrough or previs card can't load its small picture, it now shows its first saved view instead of the blank placeholder icon.

