This was a technical exercise to intentionally produce a texture for the wheat. Note: this is a surface texture.
image source: Memories of Nebraska.
Note: this same wheat texture reappears in the image Lens Effect.
Along the way, another Bryce artist, Richard Vanderlippe showed me a better way to produce the wheat effect, where he's even provided his version of the VOLUMETRIC wheat material. For your entertainment, I've combined both textures into the original setup, shown below.:
1998 06 11: