A heavy-looking entrance is not created by thickness alone. The finished impression comes from the relationship between the door construction, carving depth, edge profile, hardware and the scale of the opening.
Begin with the complete door construction
A 32 mm carved face can be appropriate as one part of a properly engineered shutter, but it should not automatically be treated as the complete structural thickness. The final build must account for the frame, stiles and rails, locks, hinges, weather exposure and the weight the hardware can safely carry.
Allow for movement
Wide solid boards respond to seasonal moisture. Stable, well-seasoned timber, sensible board widths and construction that permits movement matter more than simply choosing the heaviest species available.
Use depth selectively
Deep relief is most effective at focal areas. Quieter background fields preserve strength, reduce machining time and keep the design readable from a distance.
Final door thickness and joinery should be approved for the actual opening, exposure, hardware and timber moisture—not copied from a photograph.