Pretty much, yeah. If memory serves, the main character's home planet had been settled for several centuries. And it was only after instant travel was developed, and thus they got visitors wearing other hats, that his planets artists started doing art differently.

One of the two specific examples was that landscape painting was a popular thing to do, but painters had always painted as if the terraforming was complete-- i.e. they would include forests that weren't yet there. Only post-recontact did someone start a fad of painting the existing terraforming equipment and the dwarf trees.

This being Barnes, the other example was about what kind of pornography was being produced.