optical illusion shapes art object impossible figures line unreal geometric objects escher paradox |
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| navigate by keyword : abstract art confusion cube difficult drawing drawn effect escher fantasy figure form four futuristic geometry graphic illusion impossible figures shapes infinity mathematical minimal modern optical outline penrose perspective problem puzzle sacred simple sketch solution stroke success three threedimensional trick unreal visual |
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| Optical illusion shapes. Optical art object. Impossible figure. Line art. Unreal geometric objects. Escher paradox. |
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