Point and spot light sources produce different illumination and angles based on the location of the object. Point light sources emanate in a spherical shape, spots in a conical shape. The most advanced rendering technique on the market is ray tracing. This method draws lines from each light source to each point on an object to determine the exact shading. This is the most time-consuming, but most accurate, process of determining shading in a rendered image.
Applications Shading technology is important for most people who make three-dimensional drawings.
Without hidden line removal software, the user must determine by hand which lines are visible. Anti-aliasing and other shading methods simplify the drawing process. Shaded drawings are accurate and detailed enough for construction of an object, but are generally not visually appealing. Rendering technology allows users to produce realistic pictures. These are most important to architects and product designers, to whose clients the appearance of objects are as important as their function.