Can you guess how it was made?

"A possible model of an impossible cube of M.C. Escher"

community.wolfram.com/groups/-/m/t/875044

@ciao considering your contributions to the site, I think a number of us can look the other way for a "do this for me" question from you. ;)

One tip, tho: if you could show a picture where something similar to what you want done is demonstrated, please do so.

@ciao what if Moon is below the horizon?

@Kuba some patch on the part of the globe where it's below the horizon gets paint, and the patch where the cone exits the globe toward moon gets paint. Imagine pointing a flashlight that has a beam that expands to size of moon at the moon (and magically passes through earth) - you'd light up some ground (small patch) where moon's not visible, bigger patch where beam exits globe. My guess is rotation of Earth + orbit of Moon over time results in pinched band around globe.

@ciao understood

Could more people please test this so we can figure out what causes the problem? On some computers it's there, on some it isn't.

Am I forced to use a colorfunction with Plot3D? Because I want to plot all of it in 1 solid color, not some (cool) colormap like TemperatureMap

@user3183724 How bout

Plot3D[Sin[x + y^2], {x, -3, 3}, {y, -2, 2}, Lighting -> "Neutral",
 PlotStyle -> Red]

Or simply

Plot3D[Sin[x + y^2], {x, -3, 3}, {y, -2, 2}, PlotStyle -> Red]

if you like that better.

(what I want you to notice is that there are of course color-effects coming from the lighting of the scene)

...or Plot3D[Sin[x + y^2], {x, -3, 3}, {y, -2, 2}, Lighting -> "Classic", PlotStyle -> Red] if you want it lit old-style.

...or Plot3D[Sin[x + y^2], {x, -3, 3}, {y, -2, 2}, Lighting -> {{"Ambient", Red}}] for the effect of putting a white surface under a red light.

Hm, those seem to work quite well! Awesome!

you have a lot of flexibility here.

@user3183724 Give yourself a meaningful name! :)

Like M.J.

Thats still available

Or halitrutan

@halirutan For an account that I've been using for 2+ years, that would seem to make sense yeah

How odd... have a look at Options[MeshRegion, Lighting], and then try MeshRegion[{{0, 0, 0}, {1, 0, 0}, {0, 1, 0}, {0, 0, 1}}, {Triangle[{1, 3, 2}], Triangle[{4, 2, 3}], Triangle[{3, 1, 4}], Triangle[{2, 4, 1}]}, Lighting -> Automatic] versus the version without the explicit Lighting setting.

Is using Throw Catch to handle complicated flow ok? I mean, in catching common events in opposite to fail-like exceptions? Because I find it very convenient for that.

@Kuba I use it a lot, but to comment more confidently, would be better if you provided some toy example to demonstrate how you use it.