Pixel shape alternatives
The simplest object: (rotation)
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Disadvantage: colours are not clear enough
Sunflower: (rotation)
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Disadvantage: triggering the different layers
Mirror: (rotation)
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Disadvantege: not RGB (Yellow, Blue, Green) :: it works only from one viewpoint
Brush: (back and forth)
Disadvantage: not a 3 D effect :: small colour surface
Umbrella: (back and forth)
Disadvantage: controlling the selection
Metal bullet: (back and forth)
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Disadvantage: one viewpoint only
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