A 3 m wall mural from a 1,920 pixel image

- Source
- JPEG, 1,920 x 1,324 px, 955 KB, sRGB.
- Problem
- At 3.00 m wide the file holds 16 pixels per inch. Printed as it is, every source pixel becomes a 1.6 mm square on the wall. A standard enlargement hides the squares but turns the line work soft.
- What we did
- Enlarged to 11,811 x 8,145 px, 100 ppi at the final size of 3.00 x 2.07 m (x6.15).
- Edges that are sharp in the original rebuilt sharp at the final size.
- Paper texture and printing grain kept as they are in the source. No generative AI, nothing painted in.
- Measured
- Shrunk back to the source size, the master keeps 96 to 100 % of the fine detail of the original (correlation 0.989 to 1.000, average difference under 2 levels out of 255, 11 zones measured). A standard bicubic enlargement keeps 77 to 83 %.
- What you receive
- CMYK TIFF master in your press profile, LZW, ICC embedded
- PDF/X-4 per panel, with bleed
- Panel plan, low resolution proof and delivery note
Zoom 100 %
Each square is 360 x 360 pixels of the final file at 100 %, a 9 x 9 cm patch of the wall.
1Foam of the wave: thin dark lines and flat blue shapes.



2Title cartouche: hand cut lettering, 6 mm strokes on the wall.



3Spray over the dark sky: round dots on the printing grain.



Panel plan for this demonstration
3 panels of 1.00 m, 2 cm overlap at each join, 5 cm bleed all around. On a real job the panel width, overlap and bleed follow your media and your installer.









