a method and a device for processing light - polymerizable material for the assembly of a mold , utilizing a lithography - based generative manufacturing technique wherein a layer of a light - polymerizable material , the material being located in at least one trough having a particularly light - transmissive , horizontal bottom , is polymerized by illumination on at least one horizontal platform , the platform having a prespecified geometry and projecting into a trough , in an illumination field , wherein the platform is displaced vertically to form a subsequent layer , light - polymerizable material is then added to the most recently formed layer , and repetition of the foregoing steps leads to the layered construction of the mold in the desired form , which arises from the succession of layer geometries . the invention is characterized in that the trough can be shifted horizontally to a supply position , and the supply device brings light - polymerizable material at least to an illumination field of the trough bottom , before the at least one trough is shifted to an illumination position in which the illumination field is located below the platform and above the illumination unit , and illumination is carried out .