| Category | License | Title | Info | Download | symbol | CC BY-SA 4.0 | Rhombus 1 |  |  | OCAL | CC0 Public Domain | Prismatic Penrose Heart Variation 6 |  | | OCAL | CC0 Public Domain | Prismatic Penrose Sphere Variation 7 |  | | OCAL | CC0 Public Domain | rauten |  | | OCAL | CC0 Public Domain | greys |  | |
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