Boon Shader Pro is an add-on that provides a dedicated sidebar panel for applying and managing anime-style cel-shading materials in Eevee. It applies a real-time stylized shader to selected objects without overwriting existing material data, allowing users to revert to their original materials with a single click.

The tool includes slider controls for adjusting outlines, highlights, and rim lighting independently for each material. Outlines are generated without using geometry duplication, modifiers, or Freestyle. The shader reacts dynamically to Eevee scene lighting, allowing light direction, intensity, and backlights to drive the stylized highlights and rim effects.