The Cauldron System is a set of planets that you can use to create your own world.
It is not a savefile, as I want to allow people to set their own world settings and so on.
The planets are intended to deliver a complete survival experience, where all planets are relevant to the gameplay and complementary to each other, as they all differ from each other in what ores they contain and what survival challenges they present, making journeying to all of them a necessity. It is possible to spawn on all planets, however some present a harder challenge than others. The core idea behind this system is to replicate minecraft to some extend, with the planets equating to the three dimensions in minecraft to some extend.


These planets contain everything needed for a full playthrough, making the addition of other planets not necessarily needed. Therefore, it is recommended that you start a new empty world in creative mode, spawn in all the planets and then reload the world after setting it to survival mode and changing all the world settings to what you want.

In order to spawn the planets I recommend using the mod Console Spawn Planet.
After starting the world with that mod, write in chat /CSP.Cauldron.900000.0.0.0 to spawn the gas giant. Then spawn the other moons around it with shift+f10. The intended sizes for them are:
-Tellus: 60 km
-Agni: 30 km
-Kor: 19 km
It is possible to make them bigger or smaller, but the ore veins on the planet will stretch and shrink as well and might not be balanced anymore. Lorewise, Agni is heated up by the gas giant through tidal heating and should be close to it, i.e. about halfways through the rings. The other moons could be placed anywhere else at a reasonable distance.
Alternatively, you can also use the mod Star System Generator to generate the whole system.

Real Gas Giants mod:
The gas giant Cauldron is compatible with the mod Real Gas Giants, which will make it look considerable better. To use it, simply add the mod to your world when you are creating it, then use the Console Spawn Planet mod with chat command /CSP.RealGasGiant.900000.0.0.0 and save&exit. Locate your savefile in AppData\Roaming\SpaceEngineers\Saves, go to Storage\3232085677.sbm_RealGasGiants\Config.xml and in there, change OverrideFromConfig to true, PlanetSkin to Cauldron, RingSkin to Default2, and HasRing to true. Now you can reload the save and add the rest of the moons.

Survival World Settings:
You can set all the world options to whatever you like, but principally, the planets are balanced for the default values and all surival features (wolves, spiders, meteors, solar radiation etc.) enabled. You can always change these settings later of course. I would recommend setting the asteroid density to Lowest Density or Off, since they kind of make the planets superfluous, as asteroid can already spawn all ores.

Economy
The way to get economy stations around the planets is to first create the world with economy turned off, spawn all the planets and then reload the world with economy turned on. Since you probably don't want economy stations on the gas giant, it makes sense to temporarily remove it for generating the stations and then spawn it back in. However, this currently seems bugged and economy stations don't spawn the way they are supposed to.

Cauldron is a Class 1 Hydrogen-Helium Gas Giant. You can go to it, however there is not much there and it is mostly intended as a backdrop. Its gravity is fairly high at 1.58 g, the gravitational field will reach to about halfway through the rings. If unsupported stations is on, you can build cool cloud city like stations here, although there is not much point in doing so.

Tellus is a lush, habitable moon orbiting Cauldron at a distance just far enough to be safe from its radiation and still close enough to be heated slightly through tidal heating. Tellus is a world consisting of mostly grassy fields, forests and hundreds of small lakes that cover most of the planet. Part of the planet is covered in tall, red plateaus, which are too high up to see much rain and have turned into desertuous wastelands. Several hundred thousand years ago, Tellus was hit by a number of large meteors, which left gigantic impact craters around the planet.

Difficulty
Tellus is an easy starter planet, probably even easier than Earthlike. Ores are easy to find, ice is everywhere, there is plenty of food and few hazards. This is the intended starting point of the system.

Food
Tellus is rich in all foods, which you can find whereever it's green. The red deserts also spawn a few mushrooms. Generating algae is also an option. There are also wolves just like on Earthlike.

Power
Tellus has relatively strong winds, solar power is available and you can use ice from the lakes to generate power. There is no uranium on Tellus.

Hazards
Tellus is a relatively safe world, there is no solar radiation and no weather that would cause radiation. One of the weathers, Dust, that spawns in the red deserts makes the air unbreathable, so you have to put your visor on. There are a few wolves, especially at night.

Ores
Uranium and Platinum do not exist on Tellus. Silver can only be found in the tall, white structures in the red deserts (they are mineable). Cobalt can be found in ore veins (relatively rare) and in the small rocks you can find in forests (common, but very little ore). Gold can only be found in the center of the large, grey impact craters.

Agni is a hot, volcanic moon orbiting Cauldron at a very close distance and sits somewhere in its rings. Strong tidal forces heat up Agnis core, causing the surface to crack open and many volcanoes to erupt constantly. Agni was formed from the remains of a collision of two older moons. While most of the dense cores of both moons joined to form Agni, the rocky mantle was scattered and formed the rings around Cauldron. For this reason, Agnis gravity is relatively high, making flying on it quite difficult. For how hostile Agni looks though, it is surprisingly hospitable, with a thin, mostly breathable atmosphere and even small amounts of food growing there. Much of the moon is covered in sulphuric wastelands or volcanic rock shields and in some areas ash deserts can be found.

Difficulty
Agni has a moderate difficulty. While most ores are readily available, ice is super rare. The atmosphere is thin, while gravity is strong. Good for rovers, bad for flying. The challenges on this moon will be surviving the hazards and leaving the planet.

Food
Most foods do not grow on Agni, only a few mushrooms can be found in the yellow wastelands. Growing algae is probably the easier option. Spiders can be encountered on Agni at night.

Power
Agni has a very thin atmosphere, making wind power very weak. Solar power on the other hand works exceptionally well, making it the best choice for power generation. Ice is extremely rare and there is no uranium.

Hazards
Agni is only safe at first glance, but the thin, breathable atmosphere turns unbreathable and toxic quickly depending on the weather. Some weathers also cause radiation and while solar radiation is lowered, it still exists. The acid rain washes away the radiation again, but also causes direct damage to your health. At night, you will encounter large swarms of spiders and the atmosphere is not thick enough to prevent meteor showers.

Ores
Uranium does not exist on Agni. Cobalt and gold can be found in large quantities underneath the lava canyons. Silver can be found in the ash dunes, where all the ash drops silver ore, but in very low density, making a quarry or large miner necessary. Ice can only be found in the charred trees in the sulphuric wastelands. Each one contains a few hundred kg of ice.

Kor appears to be a small mysterious ice moon, but nobody really knows what it is or where it came from. The core of the moon is entirely made of metal structures and the ice only covers the surface, as if it was only deposited there later. Many ancient alien relicts and cities cover the surface of the moon and while they appear deserted since hundreds of millions of years, they still emit an eerie light. Some organic substances have covered parts of the moon and can seemingly survive in the complete absence of an atmosphere.

Difficulty
Kor is a difficult and confusing start, not recommended for beginners. Stone is almost nonexistant on this moon, no wind, no food and barely any solar. Once you get setup though, Kor actually provides most things you'd need and it's very easy to get to orbit.

Food
No food grows on Kor, there are also no animals. Your only options are algae farms, which are very slow due to the weakened solar power, and looting food and seed from wreckages.

Power
Kor has no atmosphere, thus no wind, and solar power is greatly reduced by the weathers. There is however a lot of Ice and Uranium to be found.

Hazards
Kor does not have many direct hazards like Agni, its difficulty lies more in the lack of things you need. Since there is no atmosphere you get full solar radiation and need oxygen of course and some areas on the moon are slightly radioactive.

Ores
Platinum does not exist on Kor. The core of the moon is all iron and the surface is either ice or drops nothing at all. Stone can only be found in some small floating rocks along with a bit of cobalt. Uranium is easily found in the ancient alien cities at the bottom of the deepest holes.