What is non-photometric raytracing ?
AccuRender 3 introduced photometric rendering. Photometric render mode works well for architectural scenes. It captures subtle differences in light and can render realistic scenes over a broad range of lighting conditions. Interior and exterior architectural scenes work well in this mode since there tends to be a broad range of lighting effects in an image. With photometric rendering lights are specified and calculated using real-world units such as watts, and exposure adjustment after the image is created is possible. Photometric raytracing is also required for radiosity calculation.
