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Light

The properties on the Light Object control how the scene is lit.

Environment

Preset

Quickly set the other “Environment” properties to one of a variety of lighting situations: bright sun, overcast, moonlight, etc.

Directional

The properties in this group control the directional light hitting the tree (which can be considered the sun).

Color

The color of the directional light.

Intensity

How much directional light exists in the scene.

Ambient

The properties in this group control both the ambient light hitting the tree and the colors shown in the background of the Tree Window.

Sky

The color used at the apex of the sky.

Horizon

The color used in the horizon of the sky.

Ground

The color of the ground plane.

Intensity

How much ambient light exists in the scene.

Ambient Occlusion (AO)

These properties allow you to tweak the result when you render Ambient Occlusion on the tree.

The new AO value follows the formula:
AOnew = ((AO + Brightness - 0.5) x Contrast + 0.5) x (Max - Min) + Min

Brightness

Makes the AO brighter/darker.

Contrast

Increases the difference between light and dark AO values.

Min

Sets the darkest value of AO.

Max

Sets the brightest value of AO.

Render

Renders new ambient occlusion.

Clear

Clears ambient occlusion to white.

Shadows

Quality

Sets the quality of shadows used. Higher quality equals sharper shadows, but also slower rendering in the Tree Window.

Bias

Shadow maps can be plagued with problems on the edges of objects. This property allows you to push, or “bias,” the shadow away from the light to avoid this problem. You most likely won't need to change this from the default.

Ground Weight

Brighten/darken the shadow cast onto the ground, if needed. You most likely won't need to change this from the default.