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Am 08.03.2011 20:32, schrieb Leroy Whetstone:
> Here are a few of my mars explorations
> The first one is the dragon (Noctis Labyriathus I believe)
> Then the Trench and Home then my favorite crater.
One hint for lighting: Topological structures (like craters) are easier
to grasp when the light in the image comes from the top left. The top
because we are accustomed to light coming from overhead rather than
below; why there's a preference for left over right is less obvious, but
I guess it is related to the handedness: When working with the right
hand, the right arm would tend to interfere with illumination from the
right, so most people will prefer working with light coming from the
left, and therefore will be more familiar with that direction of
illumination.
In the absence of any familiar shapes as hints for our eyes, relief
structures illuminated from the bottom and/or right will therefore tend
to be misinterpreted, with e.g. craters looking like plateaus instead,
and canyons looking like mountain ridges, giving the viewer a hard time
to convince his eyes otherwise.
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