Maxon Cinema 4D Studio R15 Manual descargar pdf (Pagina 54)

CINEMA 4D Renderer

3. Quick Tutorial: Global Illumination

Light as we know it in the real world spreads on its own. It is reﬂected by the objects it hits. This differs

depending on an object’s surface characteristics. Imagine a room with a window on one wall. Light is being

cast through the window onto the ﬂoor of the room. The light doesn’t stop there, but is reﬂected from the

ﬂoor onto other objects which, in turn, reﬂect the light themselves. The room is lit by diffused (indirect) light.

The raytracing procedure does not take into account diffused light. For example, if only one light is used,

everything lying in the shadows will not be visible. Maybe you have already built a virtual room into which a light

source is shining through a hole in the wall. The light in the virtual world hits an object, lights it – and that’s it. The

light spreads no further. Global Illumination rendering is different. Global Illumination rendering lets every object

within the scene act as a light source. As you will see, you can actually light a Global Illumination scene without

using a single light! Open a new (empty) ﬁle. Create a sky object (Create/Environment/Sky) and a ﬂoor object

(Create/Environment/Floor). The sky object encompasses the entire scene like a large sphere. The ﬂoor

surface is an inﬁnite surface. Create a Torus (Create/Object/Torus) and move it to a y-position of 100, slightly

above the ﬂoor.

Now we will light the scene with diffused light using Global Illumination rendering. We will use our sky object

as the light source. Switch to the Material Manager. Create a new material (Create/New Material; alternatively

you can simply double-click on the Material Manager’s gray ﬁeld). Switch to basic in the Attribute Manager.

Deactivate color and specular and activate luminance. Drag the material from the Material Manager onto the

sky object in the Object Manager.

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Maxon Cinema 4D Studio R15 Manual Pagina 54