Rasterization is a rendering technique commonly used for real-time graphics. It may not produce very lifelike lighting, but it can be used to render relatively complex geometry very fast. The technique projects polygons of the 3D models into pixels on a 2D screen, assigning each pixel an initial color value from the data stored in them. The pixel's final color depends on the added colors based on how lights hit the objects. On complex scenes (too many polygons), it can be computationally intensive.