Sorry it has taken so long but have been busy with work and family. Sorry no screenshots but if you need clarification just ask.

1. Select each part of your model with the same exact material applied.
   a. In the column of icons that appear next to the model click the grey box.
   b. Select a color then name it.
   c. Click the check mark.
   d. Repeat for each set of materials.
2. At the bottom of the screen if the icon for the different Bryce parts are showing click the circle with the grid on it to the far right to get to the animation controls.
3. With the time scrubber (blue bar) at frame zero, click the + sign next to the key to set a keyframe.
4. Move the time scrubber to the frame where you want the fade out to start.
   a. Click the + sign next to the key to set a keyframe. (you do this because Bryce interpolates the frames in between from one keyframe to the next. If we just set the transparency to 100 it will start fading out from frame zero).
5. Move the time scrubber to the frame where you want complete cloak.
6. Click the circle with the grid to go back to the icons.
7. Click the first icon from the right.
   a. Select one of the material groups
   b. In the icon column click the M to go to the material lab.
   c. There is a small upsidedown triangle in the upper right corner, click it and click on Blend Transparency.
   d. Set the transparency value to 100.
   e. Repeat for each material group.
8. To uncloak follow steps 4-7.d. except instead of transparency 100, set it to 0.