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This is the method behind my very popular picture "As Light As A Feather". I did this in Bryce 3D - Bryce 2 and 4 are almost identical to this, for all that matters.
Things To Do With Fractals In Bryce
Chapter 4: The Feather Method
(Flame Fractals as textures on 2D faces)
I created the texture for the example above (a very much simplified version of "As Light As A Feather") in KPT Fraxplorer. It does not need to be very large, but for convenience it should probably be square. The illustration to the left below shows the original size.
In Photoshop, I copied the texture and pasted it into an Alpha Channel (shown next to the texture). This is necessary to create the "feathery" transparency in Bryce later on. Black becomes transparent, white becomes opaque, with levels of grey representing different levels of translucency. To achieve some fully opaque areas, I had to increase the contrast in the Alpha Channel by a small amount.
Next, I opened an empty scene in Bryce, set the sky to plain black (available from the skies presets popup, selected the ground plane and set it to "hidden" in the Object Attributes dialogue (click on the little "A" icon in the scene after selecting the ground)
In the "Create" palette I created a 2D square, and now things get intersting. We are going to multi-replicate...
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