Nebula is a modern, open-source 3D game engine written in C++, designed for high-performance games. It supports PBR, dynamic lighting, and physics, ideal for simulations or action games. Nebula targets Windows, macOS, and Linux, with a modular architecture for customization. Without a visual editor, it suits C++ programmers, with documentation for learning. Its community is small but growing, supporting indie projects. Nebula’s focus on performance makes it perfect for developers seeking control, though 2D support is limited. Its modern C++ standards ensure robust code, appealing to professionals building complex 3D worlds.