Catfood Earth generates jaw-dropping desktop wallpaper. NASA’s Blue Marble Next Generation satellite imagery is combined with global cloud cover and accurate shading of current daylight and nighttime. Optional layers include places, time zones, earthquakes and volcanoes. This is the flagship Catfood Software product
The next layer shows nighttime by calculating the location of the Sun and its height above or below the horizon from the perspective of each pixel on the screen. NASA’s City Lights image is then blended with the Blue Marble layer. You can adjust the transparency of this effect and also the width of shading used to indicate the terminator between day and night.
Lastly clouds are blended with the image. Catfood Earth downloads a global cloud composite image from Xplanet every three hours. The coloring and transparency of the cloud layer are fully adjustable.
The changes are barely perceptible each time Earth updates your wallpaper. Over the course of a year you’ll see the summer and winter solstices (with the longest days in the northern and southern hemispheres) and the vernal and autumnal equinoxes (when the day is approximately the same length everywhere). You’ll also track hurricanes and typhoons as the clouds layer updates.