I'm modding some multi-star systems (see attachments), and something odd happen regarding light on planets.
I have the following system: a ring of 8 suns orbiting a black hole at 1 AU, a planet orbiting the black hole at 2.5 AU, and a ring of 8 suns at 5 AU.
All orbits are circulary.
(I got the same problem with the following variation: a ring of 8 suns orbiting a black hole at 1 AU, a planet orbiting the black hole at 1.8 AU, and a ring of 8 suns at 2.6 AU)
I expected the planet to be in constant daylight, since there is always at least two suns in its sky, at a distance of around 3 AU. In reality,
i got a daylight of the face facing the black hole, and a dark side… well, dark. As if there was absolutely no star illuminating the dark side.
I stopped the time, and took two shots: one showing the dark side of the planet, with a star facing it,
and one showing what i can see from the same darkside : a bright sun, just over the ground, which is plain black.
Question : is it an expected behavior ?
The weird thing is that Mars, at 1.66 AU from sun, is more enlighted than my planet with 3 suns in a range of 2-3 AU, or my planet with 4 suns at less than 2 UA.
I would accept important differences, but not total obscurity.
Answers i can think of:
- exposure, magnitude limit,… ? Nope, same config for all shots and tests: default config (including magnitude to 1).
- maybe the light side is systematically computed as the one taking most light… and the dark side as the one receiving less. There is in consequence an obligatory dark side. However, when decreasing distances of ring to 1, 1.5 and 2 AU, i got a fully lighted planet (There is still a dark side, but it's very bright, so it's less weird).
- maybe a bug, that will hopefully be fixed in the next version ?
I don't know what to think about that.