Worked on enhancing the godotengine/godot repository by developing a comprehensive unit test suite for the Sky class, focusing on rendering components within the engine. Applied C++ and test-driven development practices to validate radiance size handling, process mode behavior, and resilience against edge cases such as invalid inputs and null materials. This targeted approach improved the robustness and maintainability of the codebase, enabling earlier detection of regressions in the rendering pipeline. By expanding test coverage, the work supports future feature development and reduces debugging time, demonstrating a methodical approach to quality assurance in game development and unit testing environments.