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These crystals were created with Blender to explore textures.
In printmaking, a technique called lithography, preserves the qualities of the original drawing after it's printed. The drawing lines, texture, and tone all remain.
Using the noise generated in 3D rendering instead of trying to erase it provides a similar grain to the lithographic process.
For comparison, i created the first three images to the show the grain and other three are left clean. They both evoke feeling for the audience.