creating an alpha channel for a texture

I created the leaf texture with the tree designer of Bryce 5. The green background of the scene is better because then you won't notice the rest on the leaf-edges. First click with the magic wand into the background. Take care of the settings shown in the next picture. After selecting, use SELECTION --> INVERT SELECTION (SHIFT+STRG+I) to invert the selection. Now you have selected the leaves. Open up the channel window. WINDOW --> CHANNELS. Click on the icon SAVE SELECTION AS CHANNEL as shown in the next right picture.

Parts of the image are now coloured. They will be invisible later. Save the leaf image now as a 32 bit TGA picture.

Mirek Thier (Lolek) März 2002 / translate by Matthias Wermund (xck3001)