Shadow Mapping

What is Shadow Mapping????

First of all, what are shadows? Shadows are basically shapes that appear when an object is in front of or are  in the same area of its rays. Shadow Mapping on the other hand, are the same thing except there are added on a 3D computer graphics scene.

Shadows in general are a great use for images, films, and video games. They give realism, adds character, mood, and also gives people a sense of environment and depth when  looking upon a screen or image. 

See the difference??? Of course you do

Algorithms of Shadow Maps

There are two rendering passes when performing shadow mapping. 

1) From the light source and the other is 

2) From the observer's view. 

Cascaded Shadow Mapping

In this type of shadow map, the camera view frustum is split and a separate depth-map is created. This in fact creates a higher resolution in a 3D image. CSM is mostly used to mimic shadow rays from the sun. Therefore, in a single frame, the entire image and everything in it has shadows of its own.