Yes. From the Library Spec:
https://www.ldraw.org/article/512.html#pattern_gen
"... a plain version of the patterned part should be created even if a plain version has never been produced by LEGO."
Explanation: people can and do scrub the pattern ink off of parts. Unpatterned versions need to be available for those cases.
https://www.ldraw.org/article/512.html#pattern_gen
"... a plain version of the patterned part should be created even if a plain version has never been produced by LEGO."
Explanation: people can and do scrub the pattern ink off of parts. Unpatterned versions need to be available for those cases.