Hi Jay,
Did you try either the old standby: making sure that the fill used for the log column is not the same as that for the railing? (E.g., both look like empty fill or solid white ... make an empty fill (2) and then duplicate the wood material and associate this duplicate fill with the duplicate material.)
Or, how about SEOp subtracting the columns from the rails and ledger board?
(Agree - penetration lines are a pain.)
Karl
One of the forum moderators
AC 28 USA and earlier • macOS Sequoia 15.2, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB