sejtárnyékolást

Sejtárnyékolás, also known as cellular shading, is a rendering technique used in computer graphics to simulate the appearance of cel-shaded or cartoon-like images. It aims to replicate the look of traditional hand-drawn animation, where objects are typically rendered with flat areas of color and distinct outlines. The core principle of sejtárnyékolás involves simplifying the shading process. Instead of calculating a smooth gradient of colors based on lighting, the algorithm quantifies the lighting information into a limited number of discrete levels or "bands."

This quantization results in a less photorealistic and more stylized appearance. For instance, a surface that would be rendered with a smooth transition from light to dark in standard rendering might be displayed with just two or three distinct shades of color in sejtárnyékolás. Additionally, many implementations of sejtárnyékolás incorporate a feature to draw outlines around objects, further enhancing the resemblance to traditional animation. These outlines are often generated by detecting edges or sharp changes in surface orientation.

The technique is widely employed in video games and animated films where a distinctive artistic style is desired. It can be implemented using various methods, including post-processing effects applied to standard rendered images or by modifying the shading calculations within the rendering pipeline itself. The overall goal is to achieve a visually striking and easily recognizable aesthetic that deviates from photorealism.