Before there were retroreflective coatings on road signs, some places used retroreflective dots to trace the letters and shapes.
Before there were retroreflective coatings on road signs, some places used retroreflective dots to trace the letters and shapes.
For some reason my lemmy client, Thunder, can’t display that image from Wikipedia, but the URL is correct. I can open it in a browser.
Reuploading it to Lemmy in case others have the same issue.