Barren

Molten rift-world-molten Red-brown · hottest barren terrestrial
Hot Barren rift-world-hot-barren Warm brown · hot barren terrestrial
Barren rift-world-barren Brown-grey · neutral barren terrestrial
Cold Barren rift-world-cold-barren Grey · cold barren terrestrial
Frozen rift-world-frozen White-grey · frozen barren terrestrial

Asteroids

Asteroid Belt rift-world-belt Orbital belt with scattered minor bodies

Barren Worlds and Asteroids

Giants

Unringed
Thin Rings
Thick Rings
Warm Giant rift-world-giant-warm Warm rings: rift-ring-warm
Unringed
Thin Rings
Thick Rings
Cool Giant rift-world-giant-cool Warm rings: rift-ring-warm
Unringed
Thin Rings
Thick Rings
Cold Giant rift-world-giant-cold Cold rings: rift-ring-cold
Unringed
Thin Rings
Thick Rings
Frozen Giant rift-world-giant-frozen Cold rings: rift-ring-cold
Unringed
Thin Rings
Thick Rings
Hep Giant rift-world-giant-hep Hep rings: rift-ring-hep

Stars

O
O-Class Star rift-star-o Blue · normal-light example
B
B-Class Star rift-star-b Blue-white · normal-light example
F
F-Class Star rift-star-f + viable-light Cream-white · viable-light example
G
G-Class Star rift-star-g + viable-light Yellow · viable-light example
K
K-Class Star rift-star-k + viable-light Orange · viable-light example
M
M-Class Star rift-star-m Red · normal-light example
L
L-Class Star rift-star-l Deep orange-brown · rare class
D
D-Class Star rift-star-d White-blue · rare class
Neutron Star rift-neutron-star + rift-neutron-core Compact stellar remnant
Stellar-Mass Black Hole rift-black-hole + rift-black-hole-core Compact stellar remnant

Worlds

Temperate
Temp · Ocean–Ocean
Temp · Mountain–Savanna
Temperate rift-world-temperate Primary biome rift-secondary-[biome] + rift-tertiary-[biome]
Tropical
Tropical · Ocean–Temp
Tropical · Mountain–Fungal
Tropical rift-world-tropical Primary biome rift-secondary-[biome] + rift-tertiary-[biome]
Arid
Arid · Volcanic–Savanna
Arid · Mountain–Ocean
Arid rift-world-arid Primary biome rift-secondary-[biome] + rift-tertiary-[biome]
Arctic
Arctic · Tundra–Mountain
Arctic · Ocean–Tiaga
Arctic rift-world-arctic Primary biome rift-secondary-[biome] + rift-tertiary-[biome]
Desert
Desert · Arid–Savanna
Desert · Mountain–Ocean
Desert rift-world-desert Primary biome rift-secondary-[biome] + rift-tertiary-[biome]
Ocean
Ocean · Temp–Ocean
Ocean · Arctic–Mountain
Ocean rift-world-ocean Primary biome rift-secondary-[biome] + rift-tertiary-[biome]
Tundra
Tundra · Arctic–Tiaga
Tundra · Mountain–Ocean
Tundra rift-world-tundra Primary biome rift-secondary-[biome] + rift-tertiary-[biome]
Tiaga
Tiaga · Mountain–Arctic
Tiaga · Ocean–Temp
Tiaga rift-world-tiaga Primary biome rift-secondary-[biome] + rift-tertiary-[biome]
Mountain
Mountain · Temp–Tiaga
Mountain · Arctic–Ocean
Mountain rift-world-mountain Primary biome rift-secondary-[biome] + rift-tertiary-[biome]
Fungal
Fungal · Mountain–Tiaga
Fungal · Ocean–Tropical
Fungal rift-world-fungal Primary biome rift-secondary-[biome] + rift-tertiary-[biome]
Savanna
Savanna · Arid–Temp
Savanna · Ocean–Mountain
Savanna rift-world-savanna Primary biome rift-secondary-[biome] + rift-tertiary-[biome]
Volcanic
Volcanic · Mountain–Arid
Volcanic · Fungal–Ocean
Volcanic rift-world-volcanic Primary biome rift-secondary-[biome] + rift-tertiary-[biome]
Ocean
100%
Ocean / Ocean / Temp
85 / 15
Ocean / Temp / Ocean
70 / 30
Ocean / Temp
55 / 45
Temp / Ocean
55 / 45
Temp / Ocean / Temp
70 / 30
Temp / Temp / Ocean
85 / 15
Temp
100%
Ocean → Temp 100 → 85 → 70 → 55 | 45 → 30 → 15 → 0 Primary 55% · Secondary 30% · Tertiary 15%

System Arrangement

Each generated planetary system has one S (System Primary), the main star (mass) and planetary host. Additional stars are P (Paired), N (Near), or W (Wide): a P star forms a close pair with another star (P1, P2, etc. identifies its partner) and shares in the host's "role" without suppressing it; an N star is an unpaired nearby companion that has no planets of its own and triggers a Planet Suppression Roll against the planetary system; a W star is distant enough to have no effect and has no planets generated. One roll always represents one planetary system, even if it contains several stars. If it is wanted that two or more distant stars or pairs should each have their own planets, generate them as separate planetary systems (with separate seeds) and then state that those systems are in a far orbit around one another.

1
2
3
1
4
2
3
1
2
3
4

System Complexity

System Complexity measures how complicated, variable, and irregular a system’s stellar environment feels from the perspective of its planets. It is determined by the arrangement of nearby stars, differences in mass and spectral output among the central stars, and inconsistencies in viable light. It does not directly measure habitability—a system can be simple but hostile, or complex while still producing viable light.

When viable light is present, Complexity also serves as a measure of how worthwhile the system’s potentially terraformable worlds are. Greater stellar irregularity means fewer otherwise suitable worlds are likely to remain good terraforming candidates, so higher Complexity reduces the system’s effective pool of terraformable planets.

Display Size Compression

System-map objects use comparative compressed sizing, not one universal physical scale.

  • Rocky worlds: moderately compressed by radius.
  • Giant worlds: strongly compressed by radius so they remain visibly enormous without dominating the system strip.
  • Stars: schematic scale based on stellar mass. Spectral class controls appearance, not size.
  • Moons: schematic and uniformly sized; actual radius is displayed with the moon's information.
  • Rings: extend beyond the planet and are not included in its listed radius.
  • Values between listed standards are interpolated to the nearest whole pixel.

Rocky Worlds

RadiusDisplay Size
1,000 km26 px
2,000 km32 px
3,000 km38 px
4,000 km43 px
5,000 km48 px
6,000 km53 px
7,000 km58 px
8,000 km62 px
10,000 km68 px
12,000 km73 px
14,000 km77 px
16,000 km80 px

Giant Worlds

RadiusDisplay Size
15,000 km82 px
20,000 km87 px
25,000 km91 px
30,000 km95 px
40,000 km101 px
50,000 km106 px
60,000 km110 px
70,000 km113 px
80,000 km116 px

Stars

Stellar MassDisplay Size
0.05 M☉22 px
0.10 M☉25 px
0.20 M☉30 px
0.30 M☉35 px
0.40 M☉37 px
0.50 M☉40 px
0.60 M☉42 px
0.80 M☉45 px
1.00 M☉50 px
1.20 M☉56 px
1.50 M☉62 px
2.00+ M☉68 px
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