Based On Oscar Reutersvärd

A wooden ornament of cubes. 768×768 : 113k	A stone ornament of truncated cubes. 768×768 : 123k	Framework cubes. 768×768 : 68k	Girders. 768×768 : 49k
768×768 : 82k	768×768 : 53k	768×768 : 59k

Based On Roger Penrose

Impossible Staircase
768×768 : 126k

Just a few versions…

Staircase 3443 768×768 : 103k	Staircase 3553 768×768 : 115k	Staircase 3663 768×768 : 126k	Staircase 3773 768×768 : 132k
Staircase 4554 768×768 : 98k	Staircase 4664 768×768 : 125k	Staircase 4774 768×768 : 130k	Staircase 4884 768×768 : 133k

Copies Of Oscar Reutersvärd

Tri-bars

"Opus 2B" 768×768 : 24k	"Opus 1 No 293 aa" 768×768 : 37k	768×768 : 63k	"Follow The Groove" 768×768 : 57k
"Extended Tribar" 768×768 : 40k	"Impossible Triangle With A Twist" 768×768 : 59k	1024×768 : 49k

Four-bars

"No 274" 768×768 : 36k

"No 365 baf" 768×768 : 39k

"No 384 ag" 768×768 : 32k

1024×576 : 23k

Windows

768×768 : 74k	768×768 : 78k	768×768 : 76k
768×768 : 76k	768×768 : 76k	768×768 : 77k

Shelving

1024×576 : 21k

1024×576 : 24k

Copy Of Bruno Ernst

"Impossible Penetration"
Coloured copy of a line sketch from The Eye Beguiled & Adventures With Impossible Figures.
768×768 : 92k

Copies Of Other Artists

"Cube In Blue" by Monika Buch From The Eye Beguiled by Bruno Ernst. 768×768 : 48k	From Martin Gardner's 'Dr. Matrix' articles for Scientific American, 1976 (unknown artist). 768×768 : 51k
"A Slightly Difficult Interlocking Wood Puzzle" by Mitsumasa Anno From The Eye Beguiled by Bruno Ernst. 768×768 : 77k	My variation of the previous Wood Puzzle with the third end changed as well. 768×768 : 76k

Copies Of Other Illusions

Space Filling

768×768 : 113k

768×768 : 57k

768×768 : 128k

768×768 : 109k

768×768 : 63k

Other Objects

The intersection of two slim four-bars creates the partial outline of a cube. 768×768 : 29k

Another shape based on cubic meandering that seems possible but isn't. 768×768 : 38k

So how many right-angles do you need? 768×768 : 16k

How about some cross-bars to make a window-frame? 768×768 : 22k

The following three images show an impossible inside corner of a cube morphing to an impossible outside corner of a cube, via a truncated tri-bar, though notice it's only the width of the 'walls' that change: the hole remains the same size.
The final animated gif is a very quick preview of the animation which can be viewed by clicking on the image.

(128×128×50 frames : 44k)

Strange Geometry

These shapes are all possible : only the perspective makes them seem odd.

768×768 : 25k

768×768 : 25k

768×768 : 53k

768×768 : 31k

768×768 : 80k