This thesis presents a methodology for creating and editing realistic buildings as part of a broader plan to develop a 3D production pipeline for railroad simulations at Corys. The goal is to develop a tool integrated in Unreal Engine 5, the software used by the company, ensuring the creation of highly detailed environments while prioritizing real-time performance and efficient editing workflows. To achieve this, a comparative analysis of existing procedural generation tools was conducted, identifying their strengths and limitations. This served as the foundation for designing a solution tailored to the needs of the company. Building on a previous internship focused on procedural modeling of a single building, this thesis extends the system to support the generation of multiple buildings using real-world geographical data.