ID 131175747 © Peterhermesfurian | Megapixl.com
Sharing is not just caring, it's also about giving credit - add this image to your page and give credit to the talented photographer who captured it.:
abstract around background bistable block cognition dimensional down downwards effect experiment figure illusion impossible object optical perception perspective psychology reversal reverse reversible schroeder science stair staircase stairs stairway step steps texture textured three turn turned upside upwards vector visual white wood wooden woodwork