Start with the highest-resolution original file. Messaging apps, screenshots and social networks may reduce detail. Keep the original intact and use a copy for crop tests. Check sharpness, motion blur, faces and fine textures, and make sure you hold the required reproduction rights.

Moodwall’s preparation threshold is 120 pixels per inch at actual print size after cropping. Divide each dimension in centimetres by 2.54, then multiply by 120. A 300 × 250 cm rectangle needs at least 14,174 × 11,812 pixels, rounded up. Recalculate if installation allowances enlarge the printed area.

Changing a file’s metadata from 72 DPI to 120 DPI does not add detail. What matters is the number and quality of pixels retained after cropping. Software enlargement may create pixels but cannot guarantee the recovery of missing details; it can also introduce invented textures.

If the source is too small, ask the workshop about a graphic review without assuming a guaranteed result. Approve the prepared file at its actual size together with the wall dimensions and crop. Reaching 120 ppi is a preparation threshold, not an automatic guarantee of print quality.