Alpha Channels

One of the outputs a texture component can produce is an Alpha channel. The Alpha channel is a grayscale representation of the texture pattern or grain. When you use a texture as a component in a material channel, these grayscale values are used to map surface properties. White areas in the Alpha channel represent 100% of the effect and black areas represent 0%.

Images, or 2D textures, also contain an Alpha channel. In images, the Alpha channel acts as a mask for the image. The image's Alpha channel is used in the same way as a texture's Alpha channel.

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