A highly-regarded standalone MME effect that provides a classic 2D aesthetic, though it is generally incompatible with Ray-MMD. NCHL2 / ikPolish:

Because toon shaders rely on specular "catchers" (tiny bright spots that move across the nose or cheek), a single degree of head rotation changes the character's mood. Turn left: a sharp shadow cuts the eye, creating a villainous glare. Turn right: the cheek catches a "spark," creating innocence. Toon shaders don't just color a model; they act with it.

Now, load up your TDA Miku, drop in a Motion file, and switch that Shadow Style to Cel . Your 3D anime journey starts now.

Toon shaders embrace MMD’s greatest weakness (its non-photorealistic base) and turn it into a superpower. They allow low-poly models to look intentional. They forgive bad rigging. They celebrate the line.

repository that lists the specific features of high-end MMD shaders, including rim lighting anisotropic specular subsurface toon shading VRM MToon Specification