NOTE: stucci didn't return 'intensity' since blender 1.0, something that alsways caused headaches all over (all other textures do per definition). But, allowing stucci to return 'intensity' would break old files. To make it work for preview, I had to solve this once. Done with a version patch, so old files (including current 2.41!) won't read with color channel active for Stucci textures. (Preview.blend I saved as a 2.42 file btw!)