Correct, according to the patent info, the final design was already locked in back in late 2016.
https://www.supramkv.com/threads/how-the-supra-chief-designer-shaped-toyota’s-new-sports-car.1565/page-8#post-163076
Looking at the live photo it looks more like a shell over a chassis as seen in the post above.
A clay model would look more like this with all the windows blacked out.