OPSimTool: A custom tool for optical photon simulation in Geant4

This paper introduces OPSimTool, a set of additions to the Geant4 toolkit that simplify the development of optical photon applications and enhance the flexibility and maintainability of developed applications. The tool also provides interfaces for creating reusable and portable material build code. This tool has been developed according to users' needs and perspectives, considering frequently asked questions, most encountered challenges, and evolving needs over time in the optical category of the Geant4 official forum page.