More Wikipedia illustrations

I have been busy creating illustrations for Wikipedia. They can be seen on my user page at Wikimedia Commons. Most of them involve the spherical or elliptical coordinate systems somehow.

I also created a series of sectional drawings comparing the internal geometries of the various “Color Spheres” of (from left to right) Johannes Itten, Albert H. Munsell, and Philipp Otto Runge; as well as a fourth sphere created for comparison based on the spherical coordinate system. It is amazing how many ways there are to draw a sphere!

And I updated a couple of existing images that show how the color-making attribute saturation can be determined from the chroma and value parameters of the Munsell Color System. (Though this definition of saturation is a bit different than the one used in the HSL color space I am accustomed to.)

Lastly, I finished an old scene featuring my interpretation of Larry Niven’s Ringworld. It is a giant ring encircling a far away sun, with oceans, continents and Earth-like weather embedded into it. Here’s the latest render:

The source code for these images can be found in my new GitHub repository which I just created for this purpose.

2 thoughts on “More Wikipedia illustrations

  1. Hallo Michael,nice grafix,hey i have an idea about the representation of colors that is that now black&white are up and down or the other way around…that doesn’t make any
    sense to me…it s only a view on the one hand you have sphere(like looking towards in a ball)with in the middle a black dot . on the other hand you are in a sphere looking outside and far away where all the colors are faded you have white.i hope you see my view …sinceerlee nick+/-

    1. Sorry for the late reply. If understand what you are saying correctly, you want the sphere’s center to be pitch black and the sphere’s outer surface to be perfectly white. This is possible if you take a spherical HSL (Hue, Saturation, Lightness) representation, and swap the Lightness and Saturation parameters. You will then have to decide if you want the fully-saturated colors to be located toward the north pole or the south pole of the sphere. You can achieve this result by modifying the POV-Ray scripts I uploaded to GitHub.

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