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Figure 158: Lighting with three independent light sources

In Figure 158 the ring has the lighting settings from Figure 155 with the standard

color white. In addition it was lit with magenta, and also from the left underside with

yellow. The number and position of the light sources is shown in the window at the

lower right. The three light sources in use can be recognized by the “lit” symbols .

To see the effect of a particular lighting effect you can also temporarily turn it off.

With an object selected, clicking on a “lit” symbol turns it off . This new setting

must then be applied (assigned) to the scene. With a further mouse click on the light

source, the effect can be switched back on and then re-assigned.

You can also change the settings for the Ambient lighting. The selection of properties

(lighting color, brightness, and so on) is carried out in same way as for light sources.

3D Effects - Textures

Textures are raster graphics (bitmaps) which can be used as an object property for

the surface of an object. Every object in a 3D scene can have its own texture.

You can set a raster graphic as a texture for a 3D object in the same way as for a 2D

object (Format > Area > Bitmaps or right-click on the object > Area > Bitmaps) –

as is the case for Gradient and Hatching. More details are found in Chapter 4

(Changing Object Attributes).

If the Fill setting on the Area dialog is Color, then the Texture page is inactive.

Change it to Bitmap to activate the Texture page for 3D objects. If the texture is not

tiled or stretched and is smaller than the object, then the remainder of the area will

have the color of the Object color property on the Material page.

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OpenOffice.org OpenOffice - 3.3 Guía de usuario Pagina 128