Jun Zhang focused on stabilizing the rendering pipeline in the CodeByZach/BambuStudio repository, addressing a critical issue in wireframe rendering within the GLGizmoPainterBase component. Using C++, OpenGL, and GUI development skills, Jun delivered a targeted bug fix that ensured render data updated correctly when toggling wireframe mode. The solution involved disabling color arrays in wireframe mode to prevent visual artifacts and maintain rendering accuracy. Jun consolidated the changes into a single, traceable commit and validated the fix through targeted tests and manual checks. This work demonstrated careful attention to rendering state management and contributed to improved visual stability in the application.