A 3D print relief maker with a backed, watertight STL

A relief exported as a bare height surface has no inside. Slicers handle that differently: some repair it silently, some refuse, and some produce a single-wall object that fails on the printer. A 3D print relief maker should remove that ambiguity before the file leaves the browser.

DepthCarve builds the top surface, the perimeter walls, and a bottom face at the base thickness you set, so the downloaded STL is a solid with a defined bounding box. That is also what makes dimensions meaningful: width, relief height, and base thickness together describe the object, whereas a bare field describes nothing but relative values.

An FDM nozzle cannot reproduce a ridge narrower than its extrusion width, and a resin printer trades that limit for drainage and support problems on steep or enclosed shapes. Either way, the relief has to be gentle enough that the smallest features survive and no overhang becomes a printable cliff.

Mesh density interacts with this rather than replacing it. The default grid resolves ordinary portrait and product detail; a denser grid on a soft source adds triangles without adding shape and slows slicing, while a coarse grid on fine detail produces visible faceting that no layer height can fix. If the preview shows faceting the source does not justify, reduce the grid instead of increasing it.

The base is structural. A thin base warps under a large flat relief and gives a hanging point nothing to grip; a thick base wastes filament and lengthens every print. Choose it from how the piece will be displayed and what material it will be printed in, not from the default.

Then verify in the slicer: orientation, minimum feature width, supported overhangs, first-layer contact, and the calibrated dimensions of your own machine. The STL is a closed mesh built to your stated measurements; it is not a guarantee that a particular printer will hold them.