Alpha Maps
The alpha map works in conjunction with the color map. It uses the current texture function and blend points to create an extra channel that can be used to control all of the other surface attributes. As with the color maps the alpha map will be affected by the current wave type selected and the state of the Do Blend check box. Examples of some simple alpha maps are shown below:

Alpha Map 1
Here a simple gradient has been set up to go from alpha being 0% to alpha being 100%. On the sample cube the alpha channel has been used to control the diffuse falloff setting of the surface based on a fBm texture.

Alpha Map 2
Here a simple gradient has been set up to go from alpha being 0% going to 100% and back to 0%. On the sample cube the alpha channel has been used to control the diffuse falloff setting of the surface based on a fBm texture.


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