What is 3D model hollowing?

The pricing for most 3D printing materials is volume-based: the less material you use, the less it will cost you. For some materials, hollowing your object will also avoid deformation or discoloration.

For resin printers, the lowest point of the print, the new layer does not (generally) rise above the level of the liquid resin in the vat. Therefore, the liquid resin inside the “cup” cannot evacuate, unless you add a vent hole. This is a significant cause of failures.

With 3D modeling software you have:
– Define a wall thickness that is strong enough for your model not to break
– Add “escape(vent) holes” to your model.