Editing Environment

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The map '''environment''' are all aspects of the map that often can not be directly influenced by the player, such as terrain, weather conditions and lighting.

== Beauty ==
{{Main|Beauty}}
Terrain, flooring, objects, and plants attribute to a tile's beauty, which in turn can affect a colonist's mood.
The contents of a tile have a cumulative effect on its beauty; i.e. a granite chunk (beauty of -10) on a carpeted floor (beauty of +2) gives the tile a net beauty of -8.
Certain unsightly objects, i.e. vomit, have one value when under a roof and a lower value when unroofed. This simulates the general disgust of seeing eyesores indoors versus encountering them outside.

== Space ==
Environment space (as opposed to the [[Space|Need for Space]]) is the count of how much space there is to freely move around in a room. This is all the floor tiles that are either empty or have objects that can be passed through at full speed, such as chairs, building materials, and the various "spots". All objects that either slow down or prevent movement through are not counted towards Environment Space. The "Space" number shown in the Environment display is this count x 1.4. This number is a measure of the entire room, and does not change depending on where a pawn is standing.

== Flora ==
{{Main|Plants}}
Certain plants and trees have beauty, and may also provide [[cover]] to colonists.

== Light ==
{{Stub|section=1|reason=1) Relationship between light % and plant growth speed e.g. Tinctoria grows so slow in normal soil under torch light that it rots before it grows enough to harvest 2) Effects of [[Dark vision]] and [[Ideoligion#Lighting|Lighting:Darkness preferred]] on mentioned stat and mood penalties}}
{{For|the furniture item|standing lamp}}

Light can be generated artificially or naturally. Artificial light is produced by appliances in a limited range. Natural light is generated throughout the map on unroofed tiles. Roofed tiles will be dark unless lit artificially.

Occasionally an [[Events#Eclipse|eclipse]] befalls the planet. Natural daytime light is no longer generated until it ends.

Light's importance lies in the following effects:
* Plant growth - Most plants have light requirements to grow.
:*  0% only: {{DLC Icons|Nutrifungus}}
:*  0%+: {{#Ask: [[Min Grow Light::0]] [[Name::!Nutrifungus]]| format = template | template = DLC Icons | link = none | sort = From DLC, Name | sep = ,&nbsp;}}
:* 30%+: {{#Ask: [[Min Grow Light::0.3]]| format = template | template = DLC Icons | link = none | sort = From DLC, Name | sep = ,&nbsp;}}
:* 50%+: ''All other plants''
* Power - Solar generators only produce power when naturally lit.
* Colonists want 30% light or better. This affects:
:* Colonists' mood - Colonists in sustained darkness will have the [[Thoughts list#In darkness|'In darkness']] thought. Sleeping colonists will not have this thought. Therefore, lighting is not needed in areas only used for sleeping.
:* Colonists' movement speed - Colonists in darkness will have a reduced [[move speed]], scaling to 80% at a light level of 0%. Due to this, combat at night or under unlit roofed areas can lead to a disadvantage against non-human opponents, such as insects, manhunter animals, or mechanoids. Pawns that are [[Sight|Blind]], have the [[Ideoligion#Lighting|Lighting: Darklight preferred]] precept,{{IdeologyIcon}} or have the [[Dark vision]] gene{{BiotechIcon}} are unaffected by this factor.
:* Colonists' global work speed - Similarly to their movement speed, colonists will have a work speed penalty when working in darkness, scaling to 80% at a light level of 0%. Pawns that are [[Sight|Blind]], have the [[Ideoligion#Lighting|Lighting: Darklight preferred]] precept,{{IdeologyIcon}} or have the [[Dark vision]] gene{{BiotechIcon}} are unaffected by this factor.
* [[Surgery success chance factor]] is optimized at 50% light or better.

There are three light levels: ''Dark'' (0-29%), ''Lit'' (30-89%), and ''Brightly lit'' (90-100%). Each tile on the map has one of these light levels. The light level of a tile is listed in the tile's information area located above the Architect menu (when the menu is minimized). The light level is immediately followed by the brightness given in a percentage (%).

{| class="wikitable" style = "text-align:center; border-width=10;" width="260"
| colspan = 4 | '''Light levels according to Light (%)'''
|-
| style = "text-align:left;" | Light (%) 
| style="background-color:#B8C0B8" | 0-29 
| style="background-color:#FFFFF0" | 30-89 
| style="background-color:#FFFFD8" | 90-100
|-
| style = "text-align:left;" | Light level 
| style="background-color:#B8C0B8" | Dark 
| style="background-color:#FFFFF0" | Lit 
| style="background-color:#FFFFD8" | Brightly lit 
|}

=== Artificial light sources ===
Light in roofed areas is provided by the following appliances:

<div><li style="display: inline-table;">
{| {{STDT| sortable c_11 text-center}}
! Name !! <abbr title="The furthest away a tile can be before it falls below 30% light">Light Radius</abbr>
|-
{{#ask: [[Light Radius::+]]
  | format = template
  | template = Ask Table Formatter
  | ?Light Radius
  | sort = From DLC, Name
  | link = none
}}
|}
</li><div>

=== Daylight timing and latitude ===
Daylight, or natural light, is the light generated on unroofed tiles throughout the map. The timing and strength of daylight is affected by latitude, time of year, and time of day, due to the planet's apparent axial tilt.

This effect is more pronounced at extreme northern and southern latitudes, which can result in light levels not reaching 0% at night or 100% at daytime.

Near the central latitude, light level change throughout the day as follows:
{| class = "wikitable" width="180"
! Start time
! Light level
|- style="background-color:#FFFFF0"
| 4h || Lit
|- style="background-color:#FFFFD8"
| 7h || Brightly lit
|- style="background-color:#FFFFF0"
| 17h || Lit
|- style="background-color:#B8C0B8"
| 20h || Dark
|}

==== Day Length Table ====
Note that the below values represent the number of hours that the light level is above 30%, meaning there is no guarantee that it will reach 100%.
{| class="wikitable"
|- 
! Latitude !! Aprimay 1 !! Aprimay 6 !! Aprimay 11 !! Jugust 1 !! Jugust 6 !! Jugust 11 !! Septober 1 !! Septober 6 !! Septober 11 !! Decembary 1 !! Decembary 6 !! Decembary 11
|- 
| '''90° N''' || 0 || 0 || 0 || 24 || 24 || 24 || 24 || 24 || 24 || 0 || 0 || 0
|-
| '''75° N''' || 0 || 0 || 0 || 10.7 || 24 || 24 || 24 || 24 || 24 || 0 || 0 || 0 
|-
| '''60° N''' || 11.2 || 11.7 || 12.8 || 14.1 || 15.5 || 16.5 || 16.8 || 16.2 || 15.0 || 13.6 || 12.3 || 11.4
|-
| '''45° N''' || 12.6 || 12.9 || 13.5 || 14.3 || 15.1 || 15.6 || 15.8 || 15.5 || 14.8 || 13.9 || 13.2 || 12.7
|-
| '''30° N''' || 13.5 || 13.7 || 14.0 || 14.5 || 14.9 || 15.3 || 15.4 || 15.2 || 14.8 || 14.3 || 13.9 || 13.6
|-
| '''15° N''' || 14.3 || 14.4 || 14.5 || 14.8 || 15.0 || 15.2 || 15.2 || 15.1 || 14.9 || 14.7 || 14.5 || 14.4
|-
| '''0°''' || 15.2 || 15.2 || 15.2 || 15.2 || 15.2 || 15.2 || 15.2 || 15.2 || 15.2 || 15.2 || 15.2 || 15.2
|-
| '''15° S''' || 15.2 || 15.1 || 14.9 || 14.7 || 14.5 || 14.4 || 14.3 || 14.4 || 14.5 || 14.8 || 15.0 || 15.2
|-
| '''30° S''' || 15.4 || 15.2 || 14.8 || 14.3 || 13.9 || 13.6 || 13.5 || 13.7 || 14.0 || 14.5 || 14.9 || 15.3
|-
| '''45° S''' || 15.8 || 15.5 || 14.8 || 13.9 || 13.2 || 12.7 || 12.6 || 12.9 || 13.5 || 14.3 || 15.1 || 15.6
|-
| '''60° S''' || 16.8 || 16.2 || 15.0 || 13.6 || 12.3 || 11.4 || 11.2 || 11.7 || 12.8 || 14.1 || 15.5 || 16.5
|-
| '''75° S''' || 24 || 24 || 18.7 || 15.0 || 12.2 || 10.4 || 9.9 || 11.0 || 13.2 || 16.4 || 20.6 || 24
|-
| '''90° S''' || 24 || 24 || 24 || 24 || 24 || 0 || 0 || 0 || 24 || 24 || 24 || 24
|}

==== Plant growth time table ====
{| class="wikitable"
|- 
! Latitude !! Aprimay 1 !! Aprimay 6 !! Aprimay 11 !! Jugust 1 !! Jugust 6 !! Jugust 11 !! Septober 1 !! Septober 6 !! Septober 11 !! Decembary 1 !! Decembary 6 !! Decembary 11
|- 
| '''90° N''' || 0 || 0 || 0 || 0 || 24 || 24 || 24 || 24 || 24 || 0 || 0 || 0
|-
| '''75° N''' || 0 || 0 || 0 || 5.8 || 24 || 24 || 24 || 24 || 18.6 || 0 || 0 || 0 
|-
| '''60° N''' || 8.9 || 9.4 || 10.5 || 11.9 || 13.2 || 14.0 || 14.3 || 13.8 || 12.7 || 11.3 || 10.0 || 9.1
|-
| '''45° N''' || 11.0 || 11.3 || 11.9 || 12.7 || 13.4 || 13.9 || 14.1 || 13.8 || 13.1 || 12.4 || 11.6 || 11.1
|-
| '''30° N''' || 12.2 || 12.4 || 12.7 || 13.2 || 13.6 || 13.9 || 14.0 || 13.8 || 13.4 || 13.0 || 12.6 || 12.3
|-
| '''15° N''' || 13.2 || 13.2 || 13.4 || 13.6 || 13.8 || 14.0 || 14.0 || 13.9 || 13.7 || 13.5 || 13.3 || 13.2
|-
| '''0°''' || 14.1 || 14.1 || 14.1 || 14.1 || 14.1 || 14.1 || 14.1 || 14.1 || 14.1 || 14.1 || 14.1 || 14.1
|-
| '''15° S''' || 14.0 || 13.9 || 13.7 || 13.5 || 13.3 || 13.2 || 13.2 || 13.2 || 13.4 || 13.6 || 13.8 || 14.0
|-
| '''30° S''' || 14.0 || 13.8 || 13.4 || 13.0 || 12.6 || 12.3 || 12.2 || 12.4 || 12.7 || 13.2 || 13.6 || 13.9
|-
| '''45° S''' || 14.1 || 13.8 || 13.1 || 12.4 || 11.6 || 11.1 || 11.0 || 11.3 || 11.9 || 12.7 || 13.4 || 13.9
|-
| '''60° S''' || 14.3 || 13.8 || 12.7 || 11.3 || 10.0 || 9.1 || 8.9 || 9.4 || 10.5 || 11.9 || 13.2 || 14.0
|-
| '''75° S''' || 17.3 || 16.0 || 13.6 || 10.6 || 7.6 || 5.1 || 4.3 || 6.0 || 8.8 || 11.8 || 14.6 || 16.7
|-
| '''90° S''' || 24 || 24 || 24 || 0 || 0 || 0 || 0 || 0 || 0 || 0 || 24 || 24
|}

==== Daylight math details ====
<p style="color:#FF3333";>'''Warning!!!'''</p> '''Trigonometry ahead.'''

The calculation of sunlight is surprisingly involved. On a nutshell: the formula obtains the angle between the vectors Latitude and Sun Position, subtracts an angle θ from it (determined by Latitude), and divides this number by 0.7. Finally, this result is capped between 0 (no light) and 100% (full light).

If you only care about the final formula, go to "Final formula" below. Otherwise, carry on.

The amount of sunlight a given cell receives depends on its Latitude, Day of the year, and Hour of the day. The simplified steps to reach the final value are:

:1. Obtain the factor "u" for the given latitude
::{| class="wikitable"
|-
! Latitude !! Value of u
|-
| <= 70 || 0.2
|-
| [70, 75] || Latitude * 13/50-18
|-
| =>75|| 1.5
|}

:2. Obtain Sun Position Vector SP = <code>{SPx, SPy, SPz}</code>. Do note these formulas are not in degrees, but radians.
:* SPx = -cos(Hour * π / 12)
:* SPy = -cos(π * Day/30)  * u
:* SPz = -sin(Hour * π / 12) [NOT ACTUALLY USED, BUT PART OF THE VECTOR]

:3. Calculate angle θ. Do note that the values of this table are in degrees. To convert to radians, multiply result by π / 180
::{| class="wikitable"
|-
! Latitud !! Value of θ
|-
| <= -60 || 19
|-
| [-60, 60] || 36 - abs(x) * 17/60 <!-- |x|. Math has issues with inline comments, for some reason. It may be a style issue -->
|-
| [60, 70] || 19
|-
| [70, 75] || 299 - 4x
|-
| >75 || -1
|}

:4. Calculate the angle (Δ) between the vector Latitude (L) y SP.
:*   Δ = arc cos [ ( cos(Latitude) * SPx  + sen(Latitude) * SPy ) /  <span style="white-space: nowrap">&radic;<span style="text-decoration:overline;">&nbsp;1 + SPy<sup>2</sup>&nbsp;</span></span> ] <!-- I would prefer a math method, but I got a headache trying to make it work right.-->

:5. '''Sunlight''' = (Δ - θ)/0.7; Capped between 0 and 1 (100%).

Do note that the creation of the vector Latitude : <code>{cos(''latitude''), sin(''latitude''), 0}</code> was omitted for simplicity. 

<div class="mw-customtoggle-MathDetails" style="display:inline-block;background:rgba(128,128,128,0.5);color:white;padding:5px;border-radius:5px;outline:none;user-select:none">Final Formula:</div>

<div  id="mw-customcollapsible-MathDetails" class="mw-collapsible mw-collapsed">

[[File:Sunlight formula 3.png|600px]]

<!-- I would like to put this outside a image, but there are formatting issues with {{Math}}. Also, there is no template for roots (square or otherwise) and I had issues creating one.
(arccos [ - ( cos(Latitude) * cos(Hour*PI/12)  + sen(Latitude) * cos(PI * Day/30) * u ) /  root( 1 + (cos(PI * Day/30) * u)^2 ) ] - θ ) / 0.7 -->

Where:
<div style=display:inline-grid>
:{| class="wikitable"
|-
! Latitude !! Value of u
|-
| <= 70 || 0.2
|-
| [70, 75] || Latitude * 13/50-18
|-
| =>75 || 1.5
|}
</div>
<div style=display:inline-grid>
:{| class="wikitable"
|-
! Latitud !! Value of θ
|-
| <= -60 || 19
|-
| [-60, 60] || 36 - abs(x) * 17/60 <!-- |x|. Math has issues with inline comments, for some reason. It may be a style issue -->
|-
| [60, 70] || 19
|-
| [70, 75] || 299-4x
|-
| >75 || -1
|}
</div>

	</div></div>

Interestingly, while some effects are applied differently above latitude <code>70</code> (70° N), these do not seem to apply below <code>-70</code> (70° S). This has some odd effects on extreme Latitudes, such as the south pole having neither full darkness nor full light.

<!--Getting useful data from this formula is inconvenient. You can use [https://docs.google.com/spreadsheets/d/1dI8CoR9OMk679Gyvr8lXrKUNtfNdCQPp/edit?usp=sharing&ouid=114344865191558455918&rtpof=true&sd=true this google doc] to get a better idea of how many hours of daylight a given tile (based on Latitude) will have through the year. --><!-- Commented out for now, as I would like someone else test it before spreading it -->

<!-- Based on <code>Assembly-CSharp/RimWorld/GenCelestial</code> -->
<!-- https://www.desmos.com/calculator/zhnk6yd7nv this can be played with -->

== Openness ==
{{stub|section=1|reason=Large enough enclosed spaces seem to blur these boundaries}} 
Openness refers to the often critical aspect of structures being open to the outside. It affects many things such as temperature, item deterioration, light, exposure to weather, and certain events.

Every tile on the map falls into one of three categories:
* Outdoors - not enclosed by any structure, even if there is a roof. 
* Indoors - completely enclosed structure, completely roofed.
* Unroofed - completely enclosed structure, but with one or more unroofed tiles.

Sufficiently large unroofed rooms, approximately 300 tiles, are considered outdoors.{{Check Tag|Detail Needed}}

== Temperature ==
{{Main|Temperature}}
Environmental temperature is affected outdoors mainly by the map's biome and by the current season. Temperature affects a plant's ability to grow. Temperature affects a human's comfort, and health in extreme temperatures.

== Terrain ==
Terrain consists of the map's walking surface, terrain features, and mountain areas. Terrain affects things including walking speed, where plants can grow, and may prohibit construction.

'''Natural surface terrain''' includes soil, rich soil, marshy soil, marsh, mud, sand, lichen-covered dirt, gravel, rough stone (granite, marble, etc.), rough-hewn stone, shallow water, and deep water.

'''Terrain features''' include steam geysers and mountains. The steam from a geyser produces heat and an enclosed area around it will heat up unless unroofed. A mountain cannot be destroyed, even if all of its stone and ore has been mined out. What remains are terrain tiles listed as 'overhead mountain'.

=== Naturally generated surfaces ===
{{stub|section=1|reason=1) Other stats. Filth masks, proper terrain affordance, driesTo, extinguishesFire, beauty, cleanliness, deterioration, special attacks, traversedThought, perceived path costs vs path costs. Note: Several can be put under a "misc" column rather than an individual one 2) Anomaly terrains - Flesh and Gray surface}}
{{For|the artificial flooring|Floors#Comparison table{{!}}Floors}}
{| {{STDT| sortable c_25 text-center}}
! Type !! Move Speed Modifier !! [[Plants#Fertility|Fertility]] !! Terrain Support !! Terrain Type
|- id="Broken asphalt"
! Broken asphalt
| 100% || 0% || Heavy || ?
|- id="Chest-deep moving water"
! Chest-deep moving water
| 22% || 0% || None || -
|- id="Deep ocean water"
! Deep ocean water
| 0% || 0% || None || -
|- id="Deep water"
! Deep water
| 0% || 0% || None || -
|- id="Ice"
! Ice
| 52% || 0% || Heavy || -
|- id="Lichen-covered soil"
! Lichen-covered soil
| 81% || 100% || Heavy || Soil
|- id="Marsh"
! Marsh
| 30% || 0% || None || -
|- id="Marshy soil"
! Marshy soil
| 46% || 100% || Light || Soil
|- id="Mud"
! Mud
| 52% || 0% || None || Soil
|- id="Packed dirt"
! Packed dirt
| 100% || 0% || Heavy || Soil
|- id="Polluted soil"
! [[Pollution|Polluted soil]]
| 87% || 50% || Heavy || Soil
|- id="Rich soil"
! Rich soil
| 87% || 140% || Heavy || Soil
|- id="Rough stone"
! [[Rough stone]]
| {{%|{{Q|Rough stone|Move Speed Factor}} }} || 0% || Heavy || Stone
|- id="Rough-hewn stone"
! [[Rough-hewn stone]]
| {{%|{{Q|Rough-hewn stone|Move Speed Factor}} }}|| 0% || Heavy || Stone
|- id="Smooth stone"
! [[Smooth stone]]
| {{%|{{Q|Smooth stone|Move Speed Factor}} }}|| 0% || Heavy || Stone
|- id="Sand"
! Sand
| 76% || 10% || Heavy || Sand
|- id="Shallow ocean water"
! Shallow ocean water
| 30% || 0% || None || -
|- id="Shallow moving water"
! Shallow moving water
| 30% || 0% || None || -
|- id="Shallow water"
! Shallow water
| 30% || 0% || None || -
|- id="Soft sand"
! Soft sand
| 52% || 0% || Light || Sand
|- id="Soil"
! Soil
| 87% || 100% || Heavy || Soil
|- id="Stony soil"
! Stony soil
| 87% || 70% || Heavy || ? 
|}

=== Steam geyser ===
{{stub|section=1|reason=Specific numbers on heat needed}}
[[File:Steam geyser.png|frameless|64px]] Steam geysers are terrain features that allow the placement of a [[geothermal generator]] on them and also output a significant amount of [[temperature|heat]] when sealed in a roofed room. 

The steam geyser sprays after a random delay between {{Ticks|500}} and {{Ticks|2000}}. It will then spray for between {{Ticks|200}} and {{Ticks|500}}. While spraying, it will output 40 heat every {{ticks|20}}. Thus, it averages {{#expr: (60*40*((500+200)/2)/20)/((2000+500/2) + (200+500)/2) round 2}} heat per second, with no maximum temperature. 

Besides their use in power generation, they can also be used to heat bases and greenhouses without the need for electricity or fuel by sealing them in. Like any means of [[temperature]] regulation, geysers require an enclosed and [[roof|roofed]] [[room]] to actually cause a change in heat. If you don't want heat, keep the geothermal room without a roof.

== Weather ==
{{stub|section=1|reason=Exact details of how large fires on the map cause rain needed. Rain details should be split from the rain weather type (because its not the only weather type that includes raining) and details discussed including short circuiting, increasing fuel consumption of torch, campfire and brazier variants, which weather types include rain, whether snow counts as rain for all mechanics etc, similarly Snow and its unique effects including [[Snow]] being merged into here}}
<!--When a number of fires are detected on a map, the "firewatcher" process will increment progress to rainy weather. Exact mechanics are unknown -->
Weather events occur from time to time depending on the biome and time of year, with the current weather listed at the right edge of the screen. When a weather event ends the weather returns to Clear. Each weather event has a general effect on wind speed. Wind speed continually varies between 0% to 100% but it is not displayed onscreen. Wind speed is a direct multiplier of a wind turbine's power output. At 50% wind speed a wind turbine produces 1500W of its 3450W max. The [[Condition causer#Weather controller|"weather controller" condition causer]] {{RoyaltyIcon}} can force a single type of weather to constantly appear, and will only allow natural changes in weather once it is destroyed. 

{| class = "wikitable sortable"
|+ style = "text-align: left; font-size:120%;" | Weather types
|-
! Label
! Time of year
! Temperature range <ref>Can continue even if the temperature exits the appropriate range, once started.</ref>
! [[Weapons#Accuracy|Accuracy modifier]]
! Movement speed modifier
! Wind speed
! Wind speed modifier
! Can put out fires
! Snowing rate
! Notes
|-
| Clear
| Any
| Any
| 100%
| 100%
| None to Moderate
| 100%
| No
| None
| 
|-
| Fog
| Any
|Any
| 50%
| 100%
| None to Calm
| 50%
| No
| None
| Can accompany rain to create Foggy Rain
|-
| Rain
| Any
| {{Temperature|0|100}}
| 80%
| 90%
| Calm to Moderate
| 80%
| Yes
| None
| Rain intensity can vary. Rain will put out any outdoor fires on the map. Rain can cause electronic objects to short circuit.
|-
| Dry Thunderstorm
| Any
| Any
| 100%
| 100%
| Moderate to Extreme
| 150%
| No
| None
| [[Lightning]] strikes from thunderstorms can ignite flammable objects, including flora. If accompanied by rain the fires should be extinguished without becoming a threat.
|-
| Rainy Thunderstorm
| Any
| Any
| 80%
| 80%
| Moderate to Extreme
| 150%
| Yes
| None
|
|-
| Foggy rain
| Any
| Any
| 50%
| 90%
| None to Calm
| 150%
| Yes
| None
|
|-
| Hard snow
| Mainly Winter
| {{Temperature|-270|-0.5}}
| 80%
| 80%
| None to Moderate
| 150%
| Yes
| 120%
| Weather event that can distribute [[Snow]] onto the terrain.
|-
| Soft snow
| Mainly Winter
| {{Temperature|-270|-0.5}}
| 80%
| 100%
| None to Moderate
| 150%
| Yes
| 80%
| Weather event that can distribute [[Snow]] onto the terrain.
|-
|[[Events#Flashstorm|Flashstorm]]
| Any
| Any
| 100%
| 100%
| None to moderate
| 100%
| No
| None
| An extreme version of the dry thunderstorm, and an event of its own (rather than normal weather changes). [[Lightning]] strike many times in a row in a small area, igniting anything flammable and causing giant wildfires which can spread to your base easily. It also disables rain for a short time.
|}
<references/>

== Lightning ==
[[File:Dry Thunderstorm.png|400px|thumb|right|Lightning in a [[Environment#Weather|Dry thunderstorm]] ]]
'''Lightning''' is created either naturally through thunder and flashstorms, or artificially with the [[Psycasts#Flashstorm|flashstorm]] psycast{{RoyaltyIcon}}. These do 10 [[Damage types#Flame|Flame]] damage in a 3x3 area (1.9 block radius) and start [[fire]]s in the area of effect. Dry thunderstorms can be especially dangerous, starting fires around the map without rain to put them out. The flashstorm psycast should be used with caution, preferably in areas without vegetation or during rain. Lightning can also be spawned in with a debug command in [[development mode]].

Lightning is bright enough to momentarily power [[solar generator]]s and grow [[plants]].

== Version history ==
* [[Version/0.0.245|0.0.245]] - Weather (rain/fog) now affects chances of hitting a target
* [[Version/0.3.410|0.3.410]] - Rain now slowly washes away [[Filth|blood]]. Added rich dirt patches.
* Beta 19/ 1.0 - Changed deep moving water to chest-deep moving water: walkable but slower than shallow water. Shallow water movement cost 12 -> 22. Sand fertility 6% -> 10%.
* [[Version/1.1.0]] - Fix: Wind turbines register no wind during windy storm.


[[Category:RimWorld game]]