A method for producing a three-dimensional object, wherein the object is a tool element of an injection moulding tool, comprising the steps: - providing an item of reference object information describing in particular geometric structural data of a reference object, wherein the geometric structural design of the reference object is defined with regard to an object-specific area of application or use, and at least one item of boundary condition information describing at least one in particular geometric structural boundary condition of the object to be produced, wherein corresponding geometric structural data of the reference object described by the item of reference object information describe a basic form of the object to be actually produced that is to be modified or optimized, - determining an item of load information describing at least one load value in a specific load situation within the reference object described by the item of reference object information, by way of a computer-based simulation, - determining, from the item of load information, load regions within the reference object described by the item of reference object information with load values deviating from a reference load value, by way of a computer-based simulation, - determining an item of object information describing geometric structural data of the three-dimensional object to be produced, on the basis of the item of load information and the item of boundary condition information, - producing the three-dimensional object to be produced on the basis of the item of object information, wherein the three-dimensional object to be produced, at least in load regions with load values deviating from the reference load value, is additively produced by successive selective layer-by-layer solidification of a solidifiable construction material, wherein, in load regions with load values deviating from the reference load value, the three-dimensional object to be produced is produced with a temperature-control channel structure additively formed by successive selective layer-by-layer solidification of the solidifiable construction material by way of the energy beam generated by the radiation-generating device, through which channel structure a temperature-control medium for controlling the temperature of the produced three-dimensional object can flow. - providing an item of reference object information describing in particular geometric structural data of a reference object, wherein the geometric structural design of the reference object is defined with regard to an object-specific area of application or use, and at least one item of boundary condition information describing at least one in particular geometric structural boundary condition of the object to be produced, wherein corresponding geometric structural data of the reference object described by the item of reference object information describe a basic form of the object to be actually produced that is to be modified or optimized, - determining an item of load information describing at least one load value in a specific load situation within the reference object described by the item of reference object information, by way of a computer-based simulation, - determining, from the item of load information, load regions within the reference object described by the item of reference object information with load values deviating from a reference load value, by way of a computer-based simulation, - determining an item of object information describing geometric structural data of the three-dimensional object to be produced, on the basis of the item of load information and the item of boundary condition information, - producing the three-dimensional object to be produced on the basis of the item of object information, wherein the three-dimensional object to be produced, at least in load regions with load values deviating from the reference load value, is additively produced by successive selective layer-by-layer solidification of a solidifiable construction material, wherein, in load regions with load values deviating from the reference load value, the three-dimensional object to be produced is produced with a temperature-control channel structure additively formed by successive selective layer-by-layer solidification of the solidifiable construction material by way of the energy beam generated by the radiation-generating device, through which channel structure a temperature-control medium for controlling the temperature of the produced three-dimensional object can flow.