3D animation basically consists of generating depth in 2D objects by various means. Lighting and shading is a powerful way to provide depth to objects and characters. At first the model of the object is created using a number of polygons. The density of polygons or the number of polygons for a given area defines the smoothness of an object. In applications like 3D video games where real time response is more important than faithful reproduction, the polygon density is obviously less. In applications such as a animated movie, realism of scenes take primary importance. The complexity of the objects requires a high polygon density.

Once the objects have been modeled, they have to be imparted motion or they have to be animated. Finally the animated objects which are essentially 3D in nature have to be converted to 2D. This process is called rendering. More the polygon density, more time it takes to render an object. It is often required to combine video and 3D images. This process is called compositing. Rendering process is one of the most important in generating a 3D image. A small bit of a movie lasting just a few seconds can take days to be rendered. Render farms and piping are phrases associated with 3D animation. Mental Ray is a renderer provided as a part of Softimage and Maya 3D packages. It is also gaining in popularity among other 3D developers. Renderman is a renderer used by Pixar and some large film production companies, for development of feature films.

A number of operations are involved in creating 3D animations. The three most popular software commercially available for 3D modeling , lighting and shading are Maya, 3ds Max and Softimage .Each of the software has its strength and tools to address various requirements of 3D design and development .

Maya was originally developed by Alias which has now merged with Autodesk. The developers of Maya claim its tools have superior capabilities for production of 3D animated movies.

3ds Max is also a Autodesk product, originally from Discreet. Due to its high availability and competitive cost, 3ds Max claims to be the most popular 3D software. It has an excellent game engine and is extensively used for video game development.

Softimage 3D software is a part of Avid. The developers of this software claim mixed pipeline management leading to more efficiency, less time for development and uniquely suited for game development. The 3D computer graphics industry is therefore growing in leaps and bounds. Features like natural hair, skin and human expressions are being refined and polished, to give life like appearance to animated objects.

Oil painting as a painting medium, the usage of oil in combination with other pigments counts back to 1400. Prior to oil painting, painting in general dates its history back to the period of stone age, painting in that era was made with the usage of binders unlike oil painting mixed with some kind of pigments like egg in tempera paints.

The fifteenth century was seen as a transitional period in Europe, there was some sort of reality visualized in art. Art was changing from the decorative style and mythological during a middle age to a period of revival and rebirth with the beginning of renaissance. There was a realization among the artists, they were beginning to understand the mathematical laws behind the outlook and there was a scenario prevailing where the artist were interested in portraying more sincere and portrays that were more realistic in nature. They had initiated the usage of nature as a source of inspiration for their paintings.

Jan Van Eyck (1395-1441), a painter of the northern renaissance wanted to mimic nature and its scenic beauty along with his painting brush on the board. He wanted to paint every tiniest detail on his board to portray his paintings to be more scenic and livelier. Finally he realized that if he had to portray every tiny detail of painting to his fullest satisfaction, he had to improve on the technique of painting. Thus with this zeal to portray tiny detail of nature with clarity he became the inventor of oil painting. Initially Van Eyck and all painters during the period of renaissance did not buy ready made colors. They grounded their pigment from natural sources like plants and minerals and in turn they added binder to form a paste with which they could paint. During the middle ages the binder which was used was egg and the end- product thus formed was tempera paint, this had the tendency to dry very quickly. This property of quick drying agent did not permit smooth transitions in shading. But smooth transitions were necessary to achieve as sense of reality which Van Eyck was attempting to portray. Thus he initiated the usage of oil instead of egg. The work with oil as a binder was much slower and accurate to the satisfaction levels. An oil binder permits to provide a glossier look. With this technique he was able to apply tiny detailing with the help of pointed brushes. Later the new technique of oil painting was appreciated and there was a general acceptance of oil painting to be used as a widely used suitable medium of painting. There are many other mediums of oil paintings available but we still adhere to the usage of oil painting invented by Van Eyck.