Modeled in Blender v 2.79
Rendered with Cycles

ready for 3d print

Penrose infinite stair illusion works only when viewing through the camera or with one closed eye

dimensions: 8.05cm x 10cm x 7.1cm
step height: 2mm
metric units in the file: meters

available file formats:
stl
fbx
obj
render ready scene in .blend format

only quad topology

Low poly counters:
polys: 390
verts: 392

Hi poly counters:
polys: 56 160
verts: 56 162