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Viewpoint rendering settings in Expert mode in the "Photorealistic" engine

• Click the icon: available in the viewpoint and animation inspectors. The set values determine the rendering and displaying in the Preview window.

NB: the display of options in expert mode is activated in the Preferences dialog.

1. Display of options in standard mode

Rendering size

Print Resolution for Perspective View

2. Anti-aliasing

Anti-aliasing: Anti-aliasing Low/High.

Tip: To save calculation time, select a low value while increasing the Width/Height of the rendering.

3. Radiosity

The calculation times depend on the value chosen.

This menu allows you to set the precision parameters with predefined values. I you change the values with the sliders or the text fields, the menu will be set to custom.

Precision: Normal/Average/High/Custom.

NB: these settings have a very strong influence on the rendering time.

Tip: Calculate small-sized images or use the Batch Rendering command.

• Widened oversampling: Values from 96 to 8 pixels.

The radiosity is calculated over a small number of pixels, the others are extrapolated. This distance represents the mean distance in pixels between two points where radiosity is calculated. The lower the distance, the more the density of calculated pixels increases.

NB: these settings have a very strong influence on the rendering time.

• Reduced oversampling: Values from 0 to 48 pixels.

This is the radiosity from near surfaces (e.g. the corner between 2 walls). This requires special processing enabling shadow quality to be refined. The value selected represents the processing range. If 0, no calculation is carried out. The larger the value, the better will be the calculation of shadows with regard to radiosity.

NB: these settings have a strong influence on the rendering time.

Lighting: Interior/Exterior/Custom.

These settings affect the general ambient lighting for the scene. They are used to precisely control how the scene is exhibited.

Example: Lighting

The predefined settings Interior/Exterior give default lighting settings depending on the space chosen.

The Custom setting is used for when the user opens a file prior to version 3 of Artlantis or when the lighting values have been changed in expert mode.

NB: these parameters do not affect the calculation times.

Lighting power:

• First rebound: values from 1 to 16.

Controls the radiosity power of the first rebound (affects all surfaces receiving direct light from a heliodon or light sources).

• Next rebounds: values from 1 to 16.

Controls the radiosity power of all rebounds after the first. This affects surfaces receiving indirect light.

Increasing the number of rebounds gives more light, particularly for interior scenes.

• Attenuation: values from 0 to 1.

Controls absorption of light after one or more surface rebounds. A low value increases the contrast of the scene thus allowing strong shadows to be cast in an interior scene lit by indirect lighting.

NB: this parameter has almost no effect on exterior scenes.

Example : Attenuation

Example : First bounce

• Color transfer: values from 0 to 1.

Controls the transfer of colors between surfaces.

Reducing the value desaturates the colors.

4. Application settings

• Define as default/Default settings/Apply to all perspective viewpoints:

Respectively allow the user to define current settings as the default, to use the default settings or propagate these settings to all other views for the inspector concerned.