Oh, I'm still on a very old version (4.9)It looks like the 'conform retopo mesh' option is available on the sculpting tools now too:https://www.youtube.com/watch?v=kbWlDtBGiGA
I'm not aware of a way for 3dc to do that, but a possible workaround would be to bring your original mesh into the retopo room and manually finesse it to the updated sculpt (with snapping turned on) and export that. While not ideal...it could work in a pinch depending on how drastic the sculpting changes are. Speaking of…