A server device and a method for the server device to build a model object are described. The server device includes interface circuitry and processing circuitry. The interface circuitry is configured to receive an instruction to build a model object at the server device. The instruction is sent by a client device (e.g., user equipment) that requests services from the server device in a three-dimensional (3D) application. The client device builds the model object in a first form according to first modeling data. The processing circuitry of the server device is configured to determine, second modeling data of the model object according to the instruction, and build the model object of a second form according to the second modeling data. Then model object of the second form is used in the 3D application at the server device.