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Radiosity Controls 61

Object Animation

The radiosity solution is calculated for each

frame if any object is animated in the scene (the

default is to calculate the current frame only).

You specif y the parameters (goals/quality) you

want to reach on the Advanced Lig hting panel.

It is recommended to run a solution first and

verify if it’s successful before proceeding to the

whole animation. These parameters w ill then be

reprocessed for each frame.

You go to the render dialog, Common Parameters

rollout, and enable the option Compute Advanced

Lighting When Required, and then render the

scene. The radiosity is processed for the first frame

and then rendered. 3ds Max then moves to the

next frame, processes radiosity, renders, and so on.

Camera Animation

If objects remain static in the scene and only the

camera moves, you c an solve radiosity at frame

0, and when you render the animation, turn off

Compute Advanced Lig hting When Required.

R a diosi ty Contr ols

Render Scene dialog > Choose Default Scanline Renderer

as the production renderer. > Advanced Lighting panel

>ChooseRadiosity.

Rendering menu > Advanced Lighting > Radiosity

> Render S cene dialog > Advanced Lighting panel >

Radiosity is chosen.

Radiosity is a technique to calculate indirect ligh t.

Specifically, radiosity c alculates the interreflections

of diffuse light among all the surfaces in your

scene. To make this ca lculation, radiosity takes

intoaccountthelightingyou’vesetup,the

materials you’ve applied, and environment settings

you ’ve made.

The radiosity processing of a scene is distinct from

the rendering process. You can render without

radiosity. However, to render with radiosity, you

must always calcu late r adiosity first.

Once a radiosity solution for a scene has been

calculated, it can be used in multiple renderings,

including multiple frames of an animation. If

there are mov ing objects in the scene, radiosity

might need to b e recalculated; see Animation with

Radiosity (page 3–60).

For an overview of radiosity and how radiosity

works in 3ds Max, see Radiosity Solution (page

3–51).

For sug gestions regarding workflow for using

radiosity, see Radiosity Workflows (page 3–57).

Note: Radiosity is also known as global

illumination.

Impor tant: Ifthedimensionsofyourscenearenot

realistic, then radiosity will not show realistic lighting,

either.