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CHAPTER 12
First step is to crop the tree from the picture.
3 Using this image as a template, make a second image, in which the tree is black on a white background. This will
be your image's alpha map. Superimposing the two images makes it easier to remove any mistakes. You may also
wish to smooth the edges. Save the two images as identically-sized, non-progressive, 24-bit JPEG fi les.
The alpha map of the tree.
4 To process the images in Viewpoint Scene Builder, apply both to a VP primitive plane. Use settings that will not
render a visible edge around the plane or light it unrealistically. Save the object as an MTX fi le.
5 Import the Viewpoint MTX fi le into your Atmosphere environment and copy the MTS fi le to the folder where
you publish your environment.
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