Summary
- The usual cell shader tends to result in simple posterization, but according to this tutorial, we can add more detail by incorporating the colors of distorted Voronoi patterns.
- The advantage of using Voronoi is the ability to add large-scale detail. Noise is sometimes too uniform and smooth, making it unsuitable for adding large-scale detail. Distorting it with noise can blur Voronoi's unnatural sharp edges.
- Modifying normals is also a unique aspect of this method. It still maintains a cel-shaded appearance but is much more visually interesting.
- Additionally, we used normal compression to enhance the detail in the reflections. The reflections should neither be too smooth nor too noisy, as this could result in a pseudo-roughness. Therefore, we simulated a low-poly surface by reducing the possible values of the normals.
