Isometric impossible '4' poster — The Fourth Dimension (series #331)

Monochrome graphic poster showing an impossible isometric construction of beveled extruded blocks arranged to suggest the numeral 4 and a cross intersection....

• impossible geometry
• isometric
• number four
• optical illusion
• halftone
• monochrome poster
• minimalist design
• beveled blocks
• @hiaurorasky
• #331
• the fourth dimension
• 36dot-31
• extruded beveled block shapes
• numeral 4 composition
• plus-shaped intersection
• paper poster background
• halftone/grain texture
• thin baseline shadow line

@HiAuroraSky The Number Four #331 36DOT-31 The Fourth Dimension 05.01.2026