I've been making molds and casting resin for a year and a half now. In my experience, the molds I make get all the detail. The molds will pick up the wood grain on a piece of balsa wood, for example.
The Goblin Pump Wagons that I cast were made by Capt Piett. I disassembled the finished original into castable pieces and made a mold.
I've found that casting in resin using a pressure chamber gets all the detail of the mold and eliminates the air bubbles. The result is light and durable. When I have dropped a Pump Wagon, most of the time nothing happens. If it does break, it is at the joints where the super glue is holding the model together.
Like everyone else here, I am curious about what you are making. Can we see a screen shot or something?
I would be willing to make RTV molds of the printed pieces. I'm in the USA.