Radiosity


What is Radiosity
Radiosity takes into consideration the interreflections between diffuse surfaces. This affects all the objects with
radiosity set up in the scene. Not only is light coming from the light sources, it also comes from all of the objects in the scene that have radiosity set up and enabled.
All colors illuminate or reflect light back off of it, lighter colors more, darker color less.
Radiosity is this light being illuminated from the object's color.
Some benefits from radiosity renders are more realistic scenes or images, softer shadows.
A few example: If you have a shinny object that reflects objects around it, with radiosity it
will also reflect the light source onto the objects around it. Or an object that glows in the dark
the objects around it will receive light from the glow.

cig without radiosity
Cigarette without radiosity
 cig with radiosity
Cigarette with radiosity

no radiosity
No radiosity
 softer shadows
Radiosity creates softer shadows


softer shawdows
40% radiosity no shadows
 shinny sphere
Raytracing & radiosity no shadows

Set up radiosity

To set up radiosity on an object go to the objects property window by right clicking
on the object then select properties off the menu

object menu


or clicking on the green ball next to the objects name in the project window.

project window

Then in the object's property window select radiosity.

Object set up radiosity

This is where you set up the color of the light the object will illuminate.
And the intensity of light which will be illuminated from the object.

Select the color by clicking on one of the color swatch symbols.

color selectors

select with your system's color picker

systen color selector

or pick off the color swatch

color swatch

or select a color by typing in values in the color editor

color editor

The value slider sets the intensity of the light being illuminated by the object.

value slider

Higher values illuminate more and brighter light also farther distances.

On the radiocity render tab you will need to enable radiosity on the render tab ( options )
by putting a check in the box. This will render radiosity on all objects that have been set up
for radiosity.

radiocity

Disable radiosity on an object by removing the check from radiosity interaction
on the render tab of the object's properties window.

disable radiosity

This will let you render radiosity on some objects, while the objects you disable will not.
Here is a picture rendered using Radiosity, Raytracing and Soft Shadows

Bud Can

Click on image to view larger version

Amorphium Pro Tutorials