Device for generative production of at least one three-dimensional object by layer-by-layer selective solidification of at least one solidifiable building material by means of at least one energy beam generated by at least one radiation generating device, comprising at least one radiation generating device for generating at least one energy beam for solidifying at least one solidifiable building material, at least one coating device for carrying out at least one coating process for applying a defined building material layer of at least one solidifiable building material to a building level or to a building material layer of at least one solidifiable building material previously applied in the course of carrying out a previous coating process, at least one detection device for detecting layer information describing the quality, in particular the surface, of a building material layer applied by means of the coating device in the course of carrying out a coating process, at least in sections, the at least one detection device being set up for this purpose, characterized in that corresponding layer information during a coating operation carried out by means of the coating device, the at least one detection device being set up to carry out the detection of layer information describing the quality of corresponding building material layers simultaneously with the carrying out of corresponding coating operations for the application of defined building material layers to the building level, wherein coating, detecting corresponding layer information and irradiating can be performed simultaneously, wherein said at least one radiation generating device is adapted to generate an energy beam for solidifying said at least one solidifiable building material during a coating process performed by means of said coating device; wherein the energy beam can be directed, in particular via at least one beam deflection device, onto a region of a building material layer applied by means of the coating device, for which the at least one detection device has already detected corresponding layer information; and at least one control device for controlling the operation of the at least one radiation generating device, the at least one control device being set up to generate control information controlling the operation of the at least one radiation generating device as a function of detected layer information. at least one radiation generating device for generating at least one energy beam for solidifying at least one solidifiable building material, at least one coating device for carrying out at least one coating process for applying a defined building material layer of at least one solidifiable building material to a building level or to a building material layer of at least one solidifiable building material previously applied in the course of carrying out a previous coating process, at least one detection device for detecting layer information describing the quality, in particular the surface, of a building material layer applied by means of the coating device in the course of carrying out a coating process, at least in sections, the at least one detection device being set up for this purpose, characterized in that corresponding layer information during a coating operation carried out by means of the coating device, the at least one detection device being set up to carry out the detection of layer information describing the quality of corresponding building material layers simultaneously with the carrying out of corresponding coating operations for the application of defined building material layers to the building level, wherein coating, detecting corresponding layer information and irradiating can be performed simultaneously, wherein said at least one radiation generating device is adapted to generate an energy beam for solidifying said at least one solidifiable building material during a coating process performed by means of said coating device; wherein the energy beam can be directed, in particular via at least one beam deflection device, onto a region of a building material layer applied by means of the coating device, for which the at least one detection device has already detected corresponding layer information; and at least one control device for controlling the operation of the at least one radiation generating device, the at least one control device being set up to generate control information controlling the operation of the at least one radiation generating device as a function of detected layer information.