You may be already aware with this, but if not, Walker actually did write a small Forth (ATLAST -- https://www.fourmilab.ch/atlast/) which was used for (I think) DXFTOOL (a file converter).
It was later used by a small computer graphics studio in Tennessee for a blue/green screen matting utility and a fast roto-paint program.
It was later used by a small computer graphics studio in Tennessee for a blue/green screen matting utility and a fast roto-paint program.