A 3D printer and a method implemented therein for limiting inherent material accretion which may result during the 3D printing and which results in deformations relative to a desired form for printing. Two mechanisms are disclosed for this purpose. For example, on the basis of a provided model one mechanism includes compensating the model for inherent accretion and generating layers for printing for the 3D printer on the basis of the compensated model. Another mechanism includes generating layers for printing for the 3D printer on the basis of the model and compensating the layers for printing for inherent accretion.