Quake III - Cell Shading

The goal of this project is to add Cell Shading capabilities to the Quake III engine with Real-time performance. In order to provide such a feature the production team have decided to use Kuwahara filter. Kuwahara filter is a noise-reduction filter that preserves edges. It uses four subquadrants to calculate the mean and variance and chooses the mean value for the region with the smallest variance.quake 3 arena download