Cubemap-based Global Illumination

This video shows a simple scene in which a dynamically-generated environment map is used to provide some limited indirect illumination. Here the environment map is generated per-frame but good results can be obtained without doing this (so long as the scene isn't too dynamic).

The video also shows that (due to the nature of the deferred renderer) the environment map can be used 'recursively' (i.e. applied during the update of the cubemap) to produce multiple 'bounces'. This is basically the same mechanism by which the visual feedback works in my other videos.

Although the effect is limited (only objects on the edge of the scene - the walls in this case - can reasonably be used in rendering the environment map) the overall result dramatically improves the ambient light in a scene and can be done very cheaply, so long as updating the environment map can be kept to a minimum.

Category:

Science & Technology

Tags:

• cube
• environment
• map
• global
• illumination
• gi
• opengl
• graphics
• deferred
• rendering

[Theawesomenessisme]

Very Nice !!!