The patent application describes an Apple Pencil device with a special external light sensor and emitter. With their help, the device can determine the color and texture of surfaces in the real world.
How the device will work
The pen will be able to wirelessly transmit data about the color and texture of the surface to compatible devices such as the iPad. The patent says the pen can measure the texture of an object and monitor how lighting affects its color to get more complete information about shadows.

Images show the two built-in sensors inside the tip / Photo by Apple
As with other patents, there is no guarantee that Apple will release such a device. If that happens, the new Apple Pencil could become an indispensable tool for digital content creators, designers, visualizers and 3D modelers, as the ability to quickly and easily copy real-world textures on the iPad will be a decisive factor.
The introduction of an improved Apple Pencil also makes sense since the iPad is becoming increasingly popular with digital artists and graphic designers.
Source: 24 Tv
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