the invention the laser 16 acts with its laser beams 13 on a powder bed 52 which represents a further consistency of the at least one starting material the method is started with a specific quantity of powder of a first starting material which represents the powder bed 52 first partial quantity 7 further material in the form of powder second partial quantity 10 is added continuously or discontinuously to the powder bed 52 by means of a first and or also a second material supply 46 49 so that the powder bed 52 increases layer by layer in the building up direction 25 the composition of the material supplied may change by adding a second starting material to the first starting material in order to obtain a uniform distribution of a second phase the material supply for the second starting material is constant in terms of time and location with respect to the powder bed 52 or in order to create a material gradient in the partial quantity the material supply for the second starting material differs in terms of location with respect to the powder bed 52 and if appropriate in terms of time the material supplies 46 49 may be moved locationally in all directions x y z the first material supply 46 supplies for example a matrix material and the second material supply 49 may supply for example fibers second phases or other constituents with the laser beams 13 only the regions of the powder bed 52 that are predetermined in a predetermined cad model are compacted after the completion of the three dimensional molded body the compacted material.