I came across this image of a building and first thought that the roof was made from wood. But no, the Moiré pattern resulting from the thin lines between the roof shingles mapped onto the discrete grid of an image sensor at an angle is just effectively the same hyperbolic math that leads to the cathedral grain patterns in flat-sawn wood.
new bed-time procrastination: comparing out-of-copyright maps from the Royal Prussian State Survey from 1899 with OpenStreetMap. Found a few place names and hills in my area that weren't on there yet :3
Meh, ich hab eine Wollmütze (nur bei 30°C) gewaschen und jetzt reicht sie mir nicht mehr über die Ohren 😬 Gibt es Tricks, um die Mütze wieder aufzuweiten? #followerpower