They may look like a computer-generated images but these incredible scenes are in fact hand drawn using chalk. The 3D Master artist and former NASA worker Kurt Wenner uses his mathematical skill to create illusions on cobbles and pavements across the world. He was once commissioned to draw for the Pope, will soon be heading to London to unveil his latest creation。

　　每一件街头作品看起来都像是电脑制作而成，而实际上是用粉笔画出来的。曾为美国宇航局工作的3D粉笔画大师库特·维纳，喜欢在人行道或石子路上展开自己丰富的想象，为世界各国带来让人叹为观止的超越现实之作。维纳曾为教皇作过画，据悉，他将于近期在伦敦展示新作。