DETECTIVE COMICS ANNUAL #1:
"Clay"! Here it is: the shocking, heartbreaking origin of Clayface, including his first conflict with Batman! Actor Basil Karlo was on the cusp of fame and fortune...the kind he had dreamed of through his painful childhood...until a accident robbed him of the good looks that took him to the top. But scars don't make you a monster-only the darkness in your heart can do that-and in the wake of the accident, Karlo's darkness is revealed!
STAR WARS DOCTOR APHRA #16: