Tuesday, May 20, 2014

SciFi world generator system notes.


Last Fall I posted a quickie and general world generation system and noted I had an older one I used for traveller that I was updating to the 21st century. Some of it is here in this post, it's a big old mess of charts and a few notes, it's incomplete but I felt like sharing and wondered if anyone else out there would ever be interested in seeing more?

World Class
RR
Ring

AS
Asteroidean
Under 0.0001 Earth Masses,Small Minor Planet
SD
Sub-Dwarf
Under 0.001 Earth Masses, Large Minor Planet
DD
Dwarf
Between 0.01 and 0.001 Earth Masses
MM
Mercurian
Under 0.1 Earth Masses but over 0.01 Earth Masses
ST
SubTerran
0.1 to 0.5 Earth Masses
TT
Terran
0.5 to 2.0 Earth Masses
XT
SuperTerran
2-10 Earth Masses
CH
Chthonian
2.5-25 Earth Masses
HN
Helian/Neptunian
10-50 Earth Masses
JJ
Jovian
50-200 Earth Masses
XJ
SuperJovian
Over 200 Earth Masses, up to 80 times the mass of Jupiter
BDW
Brown Dwarf
A cool dim near-star

Hot Zone World Table (roll 2d6, 1d6 times)
2
SD - Sub-Dwarf
3
DD - Dwarf
4
MM - Mercurian
5
ST - SubTerran
6
XJ – Super Jovian
7
JJ – Jovian
8-9
TT - Terran
10
XT - SuperTerran
11
CH - Chthonian
12
HN - Helian/Neptunian


Warm Zone World Table (roll 4d6, 1d6-1 times)
4-7
AS - Asteroidean
8-9
SD - Sub-Dwarf
10-11
DD - Dwarf
12-13
MM - Mercurian
14-15
TT - Terran
16-17
JJ –Jovian
18
XJ – Super Jovian
19-20
ST - Terran
21
XT - SuperTerran
22
CH - Chthonian
23
HN - Helian/Neptunian
24
BDW - Brown Dwarf


Cold Zobe World Table (roll 2d6, 2d6-2 times)
3
AS - Asteroidean
4
SD - Sub-Dwarf
5
DD - Dwarf
6
MM - Mercurian
7
TT - Terran
8-10
JJ –Jovian
11-12
HN - Helian/Neptunian
13-14
XJ – Super Jovian
15
ST - SubTerran
16
XT - SuperTerran
17
CH - Chthonian
18
BDW - Brown Dwarf

Determine World Size within a Class
2d6-2, if result is 0 roll 1 d6 on 1-3 go Down A World Class, 4-6 use size 1; on 10 roll 1d6 on1-3 use size 9, 4-6 go up a world class

(Many more charts/tables after the break. I had to trim a bunch just from the selection I'm posting here. )


Asteroidean Atmosphere Density (roll 2d6)
Size Code
Mass
2-10
11
12
1
 0.00001
0
0
1
2
 0.00002
0
0
1
3
 0.00003
0
0
1
4
 0.00004
0
1
1
5
 0.00005
0
1
1
6
 0.00006
0
1
1
7
 0.00007
0
1
2
8
0.00008
0
1
2
9
0.00009
0
1
2
Not able to hold stable atmosphere.
Asteroidean Class will Vary from 100 km (or less) to 500 km in diameter


Sub-Dwarf Atmosphere Density (roll 1d6)
Size Code
Mass
Atmosphere Density
1
2
3
4
5
6
1
 0.0001
0
0
0
0
1
2
2
 0.0002
0
0
0
1
1
2
3
 0.0003
0
0
1
1
2
2
4
 0.0004
0
0
1
1
2
3
5
 0.0005
0
0
1
1
2
3
6
 0.0006
0
0
1
2
2
3
7
 0.0007
0
0
1
2
2
3
8
0.0008
0
0
1

3
3
9
0.0009
0
0
1
2
3
3
May only hold substantial atmosphere in the cold zone. +2 to results in cold zone if originally over 1.
Dwarf Atmosphere Density (roll 2d6)
Size Code
Mass
Atmosphere Density
2
3
4
5
6
7
8
9
10
11
12
1
 0.001
0
0
0
0
1
2
2
2
3
3
3
2
 0.002
0
0
0
1
2
2
2
3
3
3
3
3
 0.003
0
0
1
2
2
2
3
3
3
3
3
4
 0.004
0
1
2
2
2
3
3
3
3
3
3
5
 0.005
0
1
2
2
2
3
3
3
3
3
4
6
 0.006
0
1
2
2
2
3
3
3
3
4
5
7
 0.007
0
1
2
2
2
3
3
3
4
4
5
8
0.008
0
1
2
2
2
3
3
3
4
5
5
9
0.009
0
1
2
2
3
3
3
4
4
5
6
Dwarf Worlds will vary in diameter from 1,500 to 2,500 km
May only hold substantial atmosphere in the cold zone. +1 to density rolls in cold zone.


Sub-Terran Atmosphere Density (Roll 2d6)
Size Code
Mass
Atmosphere Density
2
3
4
5
6
7
8
9
10
11
12
1
0.1
0
1
2
2
3
3
3
4
5
6
7
2
0.15
0
1
2
2
3
3
4
5
6
7
8
3
0.2
0
1
2
3
3
3
4
5
6
7
8
4
0.25
0
1
2
3
3
3
4
5
6
7
8
5
0.3
0
1
2
3
3
4
5
6
7
8
9
6
0.35
0
1
2
3
3
4
5
6
7
8
9
7
0.4
0
1
2
3
4
5
6
7
8
9
A
8
0.45
0
1
2
3
4
5
6
7
8
9
A
9
0.5
0
1
2
3
4
5
6
7
8
9
A
May hold atmosphere in outer reaches of warm zone and further out. -2 to density rolls in hotzone.
Sub-Terran worlds will vary in in diameter from 5,000km to 10,000km.

Terran Atmosphere Density (roll 2d6)
Size Code
Mass
Atmosphere Density
2
3
4
5
6
7
8
9
10
11
12
1
0.5
0
1
2
3
4
5
5
5
6
6
7
2
0.625
1
2
3
4
5
5
6
6
7
7
8
3
0.75
2
3
4
5
6
6
6
6
7
8
8
4
0.875
3
4
5
5
6
6
6
6
7
8
9
5
1.0
3
4
5
5
6
6
6
7
7
8
9
6
1.25
4
4
5
6
6
6
7
7
8
8
9
7
1.5
4
5
5
6
6
6
7
7
8
9
9
8
1.75
4
5
6
6
6
6
7
7
8
9
A
9
2.0
4
5
6
6
7
7
7
8
8
9
A
Can hold significant atmosphere with water. Terran worlds with density 0-2 atmospheres likely underwent horrible cosmic tragedies, are very close to their sun, or are moons to much more massive worlds.
Terran worlds will  be 8,000 km to 12,000 km in diameter.

Super-Terran Atmosphere Density (roll 2d6)
Size Code
Mass
Atmosphere Density
2
3
4
5
6
7
8
9
10
11
12
1
2
4
5
6
7
8
8
8
8
8
9
A
2
 3
4
2
7
8
9
9
9
A
A
A
A
3
 4
6
7
8
9
9
9
A
A
A
A
B
4
 5
7
8
9
9
9
A
A
A
A
B
9
5
 6
7
8
9
9
9
A
A
A
A
B
9
6
 7
7
8
9
9
9
A
A
A
A
B
9
7
 8
7
8
9
9
9
A
A
A
A
B
C
8
 9
7
8
9
9
9
A
A
A
A
B
C
9
10
8
9
9
9
A
A
A
A
B
C
D
Can have dense atmosphere with liquid water in warm zone.
Super-Terran worlds will range from 12,500 to 20,000 km in diameter.
Chthonian Atmosphere Density (roll 2d6)
Size Code
Mass
Diameter
Atmosphere Density
2
3
4
5
6
7
8
9
10
11
12
1
6
8,000
0
1
1
2
3
3
4
D
D
D
D
2
12

0
1
1
2
3
3
4
D
D
D
D
3
18

0
1
1
2
3
3
4
D
D
D
D
4
24

0
1
1
2
3
3
4
C
D
D
D
5
30
24,000
0
1
1
2
3
3
4
C
D
D
D
6
36

0
1
1
2
3
3
4
C
D
D
D
7
42

0
1
2
3
3
3
4
C
C
D
D
8
48

0
1
2
3
3
3
4
B
C
D
D
9
54
40,000
0
1
2
3
3
3
4
B
C
D
D
Not likely to have much atmosphere as it is a failed giant stripped of much of its atmosphere.
Chthonian Worlds will vary from 8,000 to 40,000 km in diameter.


Jovian Atmosphere Density (roll 1d6)
Size Code
Mass
1
2
3
4
5
6
1
60
8
9
9
A
A
A
2
90
8
9
9
A
A
A
3
120
8
9
9
A
A
A
4
170
8
9
9
A
A
A
5
210
8
9
A
A
A
A
6
250 
8
9
A
A
A
A
7
285 
8
9
A
A
A
A
8
325
8
9
A
A
A
A
9
360
8
A
A
A
A
A
Can have superdense atmosphere in hot zone.
Jovian worlds will range from 45,000 to 140,000 km in diameter.

Atmospheric Composition for Sub-Terran to Super-Terran Worlds
Atmos
Density
2
3
4
5
6
7
8
9
10
11
12
1
1
1
1
2
2
A
A
A
A
A
C
2
1
1
1
2
2
A
A
A
B
B
C
3
1
1
2
3
3
4
A
A
B
B
C
4
1
2
3
4
5
6
8
A
A
B
C
5
1
2
3
4
5
5
6
8
A
B
C
6
1
2
3
4
5
5
5
6
7
A
C
7
1
2
3
4
5
5
6
7
8
A
C
8
1
2
3
4
5
5
6
7
8
B
C
9
1
2
3
4
5
6
7
8
9
B
D
A
1
2
3
4
5
6
7
8
9
B
D
B
1
2
3
4
5
6
7
8
9
B
D
C
1
2
3
4
5
7
8
9
A
B
D
D
1
2
3
4
5
7
9
A
B
C
D

Atmosphere Composition of Chthonian Worlds
Atmos
Density
2
3
4
5
6
7
8
9
10
11
12
1
1
1
1
A
A
A
A
A
B
B
C
2
1
1
1
1
A
A
A
B
C
D
D
3
2
4
1
1
1
A
B
B
C
D
D
4
4
3
2
1
1
A
B
C
C
D
D
B
4
3
2
1
1
A
C
C
D
D
D
C
3
4
2
1
1
A
C
D
D
D
D
D
2
1
1
1
1
A
D
D
D
D
D

Jovian and Super-Jovian Atmosphere Composition and Temperature
Zone
and Atmos
Density
2
3
4
5
6
7
8
9
10
11
12
 Hot,8
A
B
C
D
E
E
F
F
G
G
G
Hot,9
B
C
D
E
E
F
F
G
G
G
G
Hot,A
C
D
E
F
F
G
G
G
G
G
G
Warm,8
6
7
8
9
A
B
C
D
E
F
G
Warm,9
7
8
9
A
B
C
D
E
F
F
G
Warm,A
8
9
A
A
B
C
D
E
F
G
G
Cold,8
3
2
1
0
0
0
0
0
8
B
D
Cold,9
4
3
2
1
0
0
0
0
9
C
E
Cold,A
4
3
2
1
1
0
0
0
A
D
F
If size 7+ Hot Jovian add 2 to roll, If  size 6+ Hot Super-Jovian add 3 to roll
Asteroidean Composition (roll 3d6 an check as per zone)
Hot Zone
Warm
Zone
Cold
Zone
Code
Majority of composition
3-4
3-4
3
R
Rubble- mixed materials in very close proximity or bound by forces of collision.
5-7
5-6
4-5
M
Metal- Hot zone
8-13
7-12
6-7
S
Silicate- warm zone
14-16
13-15
8-12
C
Carbon- cold zone
17
16
13-15
W
Water Ice
18
17-18
16-18
I
Ices (frozen gases other than water)

Roll 2d6-2 for Value code of Asteroidean Bodies.
Asteroidean Value code indicated general relative worth of Asteroidean body for economic exploitation.
Asteroidean Value (2d6-2)
Code
Access
Quality
Demand
Reserve
0
Hazardous
Low
Low
Low
1
Hazardous
Moderate
Moderate
Moderate
2
Hazardous
High
High
High
3
Difficult
Low-Moderate
Low
Low
4
Difficult
High
Moderate-High
Moderate-High
5
Moderate
Low
Low
Low-Moderate
6
Moderate
Moderate
Moderate
High
7
Moderate
High
High
Hgh
8
Unrestricted
Low
Low
Low
9
Unrestricted
Moderate
Moderate
Moderate
A
Unrestricted
High
High
High
If a ref wishes they can create asteroids with variance in notes for Access, Quality, Demand, and Reserve.  Codes in each column are maximal for each code so by example an Asteroid with Unrestricted Access Low Quality, High Demand, and Moderate reserve would have a Asteroidean Value Code of 8 as Access is Unrestricted and quality is Low.
Note: If Radiation Level is B or C Access will be downgraded and best code for Asteroid Value is 7.
If Radiation Level is D+ Access will be Hazardous ar best resulting in best code for Asteroid Value of 2.
Atmosphere Density/Pressure
0
Vacuum
Vacc Suit
1
Transient
Vacc Suit
2
Trace
Vacc Suit
3
Very Thin
Respirator
4
Breathable at low altitude only

5
Thin

6
Terrestrial

7
Dense

8
Very Dense

9
Crushing
Unbreathable by humans
A
Super Dense
Unbreathable by humans
B
Unusual, Breathable at high altitude only

C
Unusual, Breathable at poles or equator only

D
Unusual, Pressure fluctuates dangerously


Atmosphere Composition
0
Vacuum
1
Inert- unbreathable mixture of inert gases.
2
Very Hypoxic- far too low to breathe for non-native life forms
3
Hypoxic- low oxygen content, breathable to humans but may cause hypoxia over extended periods or intense physical activity.
4
Hypoxic, Tainted
5
Normoxic- moderate oxygen content, breathable to humans.
6
Normoxic, Tainted
7
Hyperoxic- high oxygen content, breathable to humans but may cause hyperoxia over extended exposure or intense physical activity.
8
Hyperoxic, tainted
9
Extremely Hyperoxic- toxic level of oxygen in atmosphere.
A
Exotic- an unbreathable mix of gases that doesn’t qualify for the other ratings given here.
B
Volatile – not normally corrosive in the short term but may react violently (flammable or explosive) in contact with water or oxygen. Flames may ignite explosively.
C
Corrosive- humans suffer immediate damage over the short term.
D
Insidious- as corrosive but will eventually defeat equipment as well. Equipment will typically fail in hours.


Determine Hydrology Class
Hydrology class determines the basic chemistry of the hydrographic presence of a world.
Roll 3 dice on triples check On Hydrology Class Table II otherwise use Hydrology Class Table I
Hydrology Class Table I
Temperature +
Atmos. Density
2
3
4
5
6
7
8-9
10-12
1-3
1
1
1
2
2
3
3
4
4-6
1
2
2
4
4
7
7
8
7-9
2
2
4
7
7
6
8
9
10-12
3
7
7
6
6
8
9
A
13-15
7
6
5
8
A
A
A
A
16-18
5
5
A
A
A
A
A
A
19+
B
5
A
A
A
A
A
A

Hydrology Class Table II
Die roll
Hydrology Class
2
1
3
2
4
3
5
4
6
5
7
A
8
9
9
8
10
7
11
6
12
B


For atmosphere compositions of 3,5 or 7 shift to 4,6, or 8 respectively if hydrology differs from Water. On a world with Atmos. Densities 0-2 and temperature A or higher there will be no water on a world in hot zone of Terran-Class or smaller as such they will be Hydrology Class 0
Hydrology Class Code Definition
0-     Dry
1-     Condensed Atmosphere
2-     Hydrocarbon
3-     Methane/Ethane
4-     Methane
5-     Sulphur
6-     Chlorine
7-     Ammonia
8-     Ammonia/Water
9-     Water/Ammonia
A-     Water
B-     Phosphorus
Hydrographic Occurrence
2d6-2 Warm and Cold Zone Worlds
3d6-12 Hot Zone Worlds


Temperature- will be tied to world type and zone

Degrees C
Gas Giant Upper Deck
 Note
0
0 to -200
Methane

1
-200 to -150
Ammonia


2
-150 to -100
Ammonia

3
-100 to -50
Amonia/Water

4
-50 to 0
Water
Psychrothermal
5
0 to 25
Water
Cool-Mesothermal
6
26 to 50
Water
Warm-Mesothermal
7
50 to 100
Water/Sulfur
Thermoplanet
8
100 to 150
Water/Sulfur
Hyper-Thermoplamet
9
150 to 200
Sulfur

A
200 to 400
Sulfur

B
400 to 600
Cloudless
Lava
C
600 to 800
Cloudless
Lava
D
900 to 1000
Alkali
Lava
E
1000 to 1500
Alkali/Ferro-Sillicate
Lava
F
1500 to 2000
Ferro-sillicate
Lava, Precious metals would be liquids.
G
Over 2000
Carbon
Lava, Precious metals would be liquids.


Radiation Levels
Rad Level

0
negligible
1
Chest x-Ray
2
terrestrial background exposure
3
Abdominal X-Ray, High altitude terrestrial expo.
4
Uranium miner annual exposure limit
5
Low Cancer Rate in Humans
6
Mild Radiation Sickness
7
Light Radiation Poisoning
8
Moderate Radiation Poisoning
9
Severe Radiation Poising
A
Acute Radiation Poisoning
B
Near Instant Terminal Radiation Exposure
Data Loss possible
C
 Data Loss Likely
D
 Equipment Damage Likely
E
 Catastrophic Data Loss Likely
F
 Catastrophic Equipment Damage Likely



Terran Radiation Levels
Atmos.
Density
2
3
4
5
6
7
8
9
10
11
12
0
1
2
2
3
3
4
4
5
6
7
8
1
1
2
2
3
3
4
4
5
6
7
7
2
1
2
2
3
3
4
4
5
6
6
7
3
1
2
2
3
3
3
4
4
5
6
6
4
0
1
2
2
3
3
3
4
4
5
6
5
0
1
1
2
3
3
3
4
4
5
6
6
0
1
1
2
3
3
3
3
4
5
6
7
0
0
1
2
3
3
3
3
4
5
6
8
0
0
1
2
2
3
3
3
4
5
6
9
0
0
0
1
2
3
3
3
4
5
6
A+
0
0
0
1
2
3
3
3
3
4
5
If in Hot Zone add 1 results (not die roll), if in Cold Zone subtract 2 from results (not die roll)
If moon of Jovian or Super Jovian raise radiation level to that of parent if atoms. density of moon is 7 or less, raise by 1 otherwise if parent has higher radiation level from that rolled here.
More notes: The basics of the planet aren't done yet. There's some biosphere codes and civilization codes that have to be worked up too.

2 comments:

  1. I think if you have more, I would like to see more.

    I use an old system, similar to this, written by someone names John Ross (and it's not S. John Ross on G+).

    It was ages ago and I can't remember where it came from - maybe even via USENET before there was a WWW.

    So, something up to date would be nice!

    Dale

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    Replies
    1. Well I shall post them. They will turn up as either a dribble of better organized posts over a couple weeks or a big shotgun blast of posts.

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