A large design showed nothing but a progress bar until it had rebuilt completely. While
it rebuilds, the evaluation now offers the model built so far (placed as the design
places it) every 1.5 s to a window that asks, and the open card draws it as a small
picture on a thread of its own, the way it shows a saved preview. The bodies' meshes
made for it are the ones the finished model shows, so little is done twice. A design
that opens within the first interval shows none.
Co-authored-by: Claude Opus 5.5 <[email protected]>
