after degas, hudson wrote cad-3d for the atari st, published by antic software (run by gary yost), which was later renamed cyber studio. cad-3d started as a port of solid states to the atari st. hudson abandoned the atari st when expected improvements in the hardware did not occur. working with yost, jack powell, and dan silva, "the yost group" developed 3d studio for ms-dos-based pcs, published in 1990 by autodesk. the animated short "cornerstone", which shipped with 3d studio, was created by hudson.