Unicron, the .pak in OP has correct orbital period, I guess you had the old version?

Unicron,
the orbital duration of TRAPPIST-1 d is 4.05 days. The orbital duration of 18.202 days refers to the old TRAPPIST-1 version when only 3 planets were known. The data for TRAPPIST-1 d were inaccurate.

SpaceEngineer, in your TRAPPIST-1 pak under 0.9.8, TRAPPIST-1 b is an oceania with no clouds. (You can see this in the screenshot kham132 posted on page 2.) Is the lack of clouds unrealistic, and should the script have a cloud layer added only to that planet?

SpaceEngineer, in your TRAPPIST-1 pak under 0.9.8

Actually, it is for SE version 0.981. The 'PeriodDays' parameter does not exist until 0.981.
[hr]
By the way, this is the reason that in SE 0.980 as orbital time for TRAPPST-1 d is displayed 18,202 days. The parameter 'PeriodDays' is ignored, and the value is taken from the old script of TRAPPIST-1, that only contains three planets.

Didn't noticed, nice catch JackDole.

I fixed the addon, update link is in the OP. I also confused the planets classes: it's planet а must be oceania, not g, because of its density (3.3 g/cm³). Planet h is too dense to ice world, it must be a desert too. Now classes are:

b - oceania
c - desert
d - terra
e - terra
f - oceania
g - desert
h - desert

Planets d and e are terras to make the addon more fancy, but in reality they are most likely deserts.

Star luminosity is increased 2 times to make temperatures on planets more high, because in SE temperature calculation on planets of cool stars is somewhat inaccurate.

Now it's TRAPPIST-1 d that doesn't have any clouds in 0.9.8.

But the apparent magnitude it will be always incorrect, or will be fixed the issue of temperature of the planets?

A documentary made using the OP's pak:
 [youtube]XqdspJDitzQ[/youtube]

Wow nice!
There is a last minor error in my addon: mass of the planet h is 0.41, it was copy-pasted from planet d. This is because I made the script by copy-pasting blocks of code... But anyway 0.41 Earth masses is a realistic mass for a planet of 0.75 Earth radii. If removing mass of the planet h from the script, SE generates mass of 0.2 for it, and making it an ice world.

Dr. Kaii, I liked it a lot! Actually the direction is not amazing, but still a very nice video.

Dr. Kaii, Nice video man !

Dr. Kaii, well made video I really liked it!

Dr. Kaii, I liked it a lot! Actually the direction is not amazing, but still a very nice video.

Thanks for the feedback, any chance you could give me some tips to improve? This is going to be my main series for a while now
Thanks for the kind words guys! 

Awesome addon, Thank You