Pics

A Pic (aka rendering) is the process of adding colors, textures, lighting and background to a 3d model and converting it into a 2d photorealistic image.

Rendering methods

Many different and specialized rendering methods have been produced from basic wireframe and polygon rendering to more advanced techniques such as scanline rendering, ray tracing and radiosity. Rendering may take from a few seconds to many days for a single image/frame depending on the complexity.

Types of Shading

Reflection/Scattering
Shading

Rendering Techniques

Flat shading
Gouraud shading
Texture mapping
Phong shading
Bump mapping
Cel shading