Realistic Scenes in CAD Application

3D computer graphic artists have focused more on animated films, broadcast, feature films, interactive video games, visual effects and web. Especially for industrial and technical design, rendering process is not given due attention. This paper presents a way to achieve realistic images in the technical field. Creating quality images in CAD programs depends on Render. Render is the process of creating a sequence of images of a scene. CAD graphics programs make intense mathematical calculations and apply the laws of physics to achieve in a realistic way light, shadows, reflections and textures. The render of lights, shadows and textures is realized using Render software that includes two basic categories: ray casting and ray tracing. Ray casting can lead to the creation of high-quality images using light, shadows, textures and different effects. However, for a greater realism, requires reflection and refraction which can be achieved with ray tracing.