The drawing board vector makes a great presentation device. The star pattern has it's uses too... All done in Illustrator CS3 with a studio manager who goes on... and on... and on!
Free triangle illusion Penrose vector image by Apaganza Art, the creative studio and brainchild of English graphic designer Ivan Longland. Using Photoshop since version 2Beta and Adobe Illustrator since the ’88 version, Longland is a true pioneer of computer art and digital graphics.