Loading Pictures Into the Library

You can load pictures into the library to create your own custom library. Pictures can be loaded into any of the three preview windows. If you want to add a new picture to the library, you need to load it into the last preview window, the Combined Image window.

When you load a picture into the first window, you're loading only the picture's RGB (Red, Green, and Blue) color information. The picture loaded into the first preview window replaces the currently selected picture in the library, so you're replacing a picture in the library with the picture you're loading. Be careful when replacing the RGB Image since this will replace the texture for all objects that currently use the same image.

When you load a picture into the second window, you're loading only the picture's alpha channel. The alpha channel determines which portions of the picture are visible. The areas of the picture that are transparent appear as a checkerboard pattern. Every picture should have an alpha channel assigned to it. If the picture does not have an alpha channel, the resulting Alpha image appears completely white.

If your picture doesn't have an alpha channel, you can copy the image from the RGB Image window into the Alpha Channel window. This way your picture won't appear completely opaque.

The Alpha channel you load does not have to necessarily match the image. You can create some interesting clipping effects by combining different alpha channels and images.

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