> Is it a secret feature....

Yes.   Look no further.   I've already said too much already.





The bicubic_patch has v_steps and u_steps.
http://news.povray.org/povray.general/message/%3C374EC19C.39285F01%40aol.com%3E/#%3C374EC19C.39285F01%40aol.com%3E


I'm wondering if there's some other primitive that might have been under
consideration for implementation, or an existing one that might have benefited
from the addition of a keyword...

Could be so many things.

http://wiki.povray.org/content/HowTo:Turn_a_continuous_function_into_a_stepped_function

http://news.povray.org/povray.general/thread/%3C44b79dae$1@news.povray.org%3E/?ttop=373263&toff=1550

http://news.povray.org/povray.unofficial.patches/thread/%3C39A30BD5.5E049847@club-internet.fr%3E/

http://news.povray.org/povray.news-submissions/thread/%3C40a14e8c%40news.povray.org%3E/


OH - HEY!   is "step" a CAD file format?
http://news.povray.org/povray.advanced-users/thread/%3Cweb.53bc16a761a21688e9033540@news.povray.org%3E/

http://news.povray.org/povray.tools.general/thread/%3Cweb.4b7a2608fde57a8dda6353d60%40news.povray.org%3E/

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