i and my friend/co-author have a race who are not really alien - they are
ex-humans with a dual nature and were intended to be vampire-esque, enough
to inspire vampire legends in their own universe, but in fact, they are
obligate carnivores much like the felid family. they are sensitive to
sunlight, or, rather, to its UV component, and spend the daylit hours in
short-term torpor in the ground or in some close, dark sealed space. during
the transformation they develop a pervasive melanism whose degree depends
on their original genetic makeup, which makes them more resistant to
radiation burns and gives them a very distinctive appearance (dark mouth,
gums, tongue, eye sclera, palms and feet that are as dark as the rest of
their skin). after a while, they also develop a darker stain on the most
sensitive areas of the face, around the lips and eyes, as well as a stain
pattern across the remaining skin surface that resembles that seen in wild

if you are interested, you can find a more or less complete description of
the race here:

i'm preparing to rp one of our characters in this game and the moderators
had asked me to give the most basic race information in his profile, as he
is one of a kind.


 On Dec 13, 2014 9:53 AM, "Patrik Austin" <[log in to unmask]> wrote:

> I've had no attempts of my own but in case you're interested in a
> biological point of view, it's known as Gloger's rule that warm-blooded
> animals living in intense sunlight have darker skin, so this would probably
> be true on an alien planet as well. There are known exceptions to the rule
> On the other hand species living in rain forests near the equator are less
> exposed to direct sunlight. An alien atmosphere could also be much cloudier
> than ours, or sunnier if it's closer to its sun for instance.
> But you don't see much of the skin of most animals because it's usually
> covered by hair or feathers. I don't know if there's any particular reason
> to assume that intelligent species are more likely to be bare-skinned.
> What's actually been studied in regard to alien planets is how different
> sunlights affect the colour of vegetation
> (with some nice pictures).