diff --git a/README.md b/README.md
index 8851644..0a9cace 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,9 @@ Experience the humid air of the rain forest and harsh desert sandstorms.
 - Wind sound: *CC BY (3.0)* by InspectorJ from https://freesound.org/people/InspectorJ/sounds/376415/
 - Hail sound: *CC0* by ikayuka from https://freesound.org/people/ikayuka/sounds/240742/
 
+### Other
+- Original ice hud overlay: *CC0* by Simon Matzinger from https://freestocktextures.com/texture/winter-snow-frozen,995.html, edits by me under *CC0* as well
+
 ### Assets in screenshots
 - All screenshots and editing by me: *CC BY-SA (4.0)*
 - Lato Font (for the Logo): *OFL* by Łukasz Dziedzic from http://www.latofonts.com/lato-free-fonts/
diff --git a/ca_effects/leave_color.lua b/ca_effects/leave_color.lua
deleted file mode 100644
index e69de29..0000000
diff --git a/ca_weathers/ambient.lua b/ca_weathers/ambient.lua
index 35c7277..5206878 100644
--- a/ca_weathers/ambient.lua
+++ b/ca_weathers/ambient.lua
@@ -2,15 +2,17 @@ local name = "regional_weather:ambient"
 
 local CLOUD_SPEED = 1.8
 
-local conditions = {}
+local conditions = {
+	min_light = 15
+}
 
 local function generate_effects(params)
 	local override = {}
 
-	override["climate_api:clouds"] = {
+	--[[override["climate_api:clouds"] = {
 		size = climate_api.utility.rangelim(params.humidity / 100, 0.25, 0.98),
 		speed = vector.multiply(params.wind, CLOUD_SPEED)
-	}
+	}]]
 
 	local movement = params.player:get_player_velocity()
 	local movement_direction
diff --git a/ca_weathers/deep_cave.lua b/ca_weathers/deep_cave.lua
new file mode 100644
index 0000000..64f1499
--- /dev/null
+++ b/ca_weathers/deep_cave.lua
@@ -0,0 +1,20 @@
+local name = "regional_weather:deep_cave"
+
+local conditions = {
+	max_light = 14,
+	--max_height = -100
+}
+
+local effects = {}
+effects["climate_api:skybox"] = {
+	sky_data = {
+		type = "plain",
+		base_color = { r = 0, g = 0, b = 0 },
+		clouds = false
+	},
+	sun_data = { visible = false },
+	moon_data = { visible = false },
+	stars_data = { visible = false }
+}
+
+climate_api.register_weather(name, conditions, effects)
diff --git a/ca_weathers/hail.lua b/ca_weathers/hail.lua
index 231a0e6..c571fb5 100644
--- a/ca_weathers/hail.lua
+++ b/ca_weathers/hail.lua
@@ -5,7 +5,8 @@ local conditions = {
 	max_height			= regional_weather.settings.max_height,
 	max_heat				= 45,
 	min_humidity		= 65,
-	min_windspeed		= 2.5
+	min_windspeed		= 2.5,
+	min_light				= 15
 }
 
 local effects = {}
diff --git a/ca_weathers/pollen.lua b/ca_weathers/pollen.lua
index 0e3dd9d..88c7ff0 100644
--- a/ca_weathers/pollen.lua
+++ b/ca_weathers/pollen.lua
@@ -6,7 +6,8 @@ local conditions = {
 	min_heat				= 40,
 	min_humidity		= 30,
 	max_humidity		= 40,
-	max_windspeed		= 2
+	max_windspeed		= 2,
+	min_light				= 15
 }
 
 local effects = {}
diff --git a/ca_weathers/rain.lua b/ca_weathers/rain.lua
index b095f5e..ae0c73c 100644
--- a/ca_weathers/rain.lua
+++ b/ca_weathers/rain.lua
@@ -5,7 +5,8 @@ local conditions = {
 	max_height		= regional_weather.settings.max_height,
 	min_heat			= 30,
 	min_humidity	= 50,
-	max_humidity	= 65
+	max_humidity	= 65,
+	min_light			= 15
 }
 
 local effects = {}
diff --git a/ca_weathers/rain_heavy.lua b/ca_weathers/rain_heavy.lua
index a1c9327..36898fc 100644
--- a/ca_weathers/rain_heavy.lua
+++ b/ca_weathers/rain_heavy.lua
@@ -4,7 +4,8 @@ local conditions = {
 	min_height		= regional_weather.settings.min_height,
 	max_height		= regional_weather.settings.max_height,
 	min_heat			= 40,
-	min_humidity	= 65
+	min_humidity	= 65,
+	min_light			= 15
 }
 
 local effects = {}
diff --git a/ca_weathers/sandstorm.lua b/ca_weathers/sandstorm.lua
index b67f311..39e4acb 100644
--- a/ca_weathers/sandstorm.lua
+++ b/ca_weathers/sandstorm.lua
@@ -5,12 +5,16 @@ local conditions = {
 	max_height = regional_weather.settings.max_height,
 	min_heat				= 50,
 	max_humidity		= 25,
-	min_windspeed		= 6
+	min_windspeed		= 6,
+	min_light				= 15
 }
 
 local effects = {}
 
-effects["regional_weather:damage"] = true
+effects["climate_api:hud_overlay"] = {
+	file = "weather_hud_sand.png",
+	z_index = -100
+}
 
 effects["climate_api:particles"] = {
 	min_pos = {x=-9, y=-5, z=-9},
diff --git a/ca_weathers/snow.lua b/ca_weathers/snow.lua
index 219a8be..f7370ed 100644
--- a/ca_weathers/snow.lua
+++ b/ca_weathers/snow.lua
@@ -5,7 +5,8 @@ local conditions = {
 	max_height = regional_weather.settings.max_height,
 	max_heat				= 40,
 	min_humidity		= 50,
-	max_humidity		= 65
+	max_humidity		= 65,
+	min_light				= 15
 }
 
 local effects = {}
diff --git a/ca_weathers/snow_heavy.lua b/ca_weathers/snow_heavy.lua
index afc6a2a..28c1956 100644
--- a/ca_weathers/snow_heavy.lua
+++ b/ca_weathers/snow_heavy.lua
@@ -4,21 +4,37 @@ local conditions = {
 	min_height = regional_weather.settings.min_height,
 	max_height = regional_weather.settings.max_height,
 	max_heat				= 30,
-	min_humidity		= 65
+	min_humidity		= 65,
+	min_light				= 15
 }
 
 local effects = {}
 
-effects["regional_weather:spawn_snow"] = true
+effects["climate_api:hud_overlay"] = {
+	file = "weather_hud_ice.png",
+	z_index = -100
+}
 
 effects["climate_api:particles"] = {
-	min_pos = {x=-12, y= 5, z=-12},
-	max_pos = {x= 12, y=9, z= 12},
-	exptime=8,
+	min_pos = {x=-8, y=3, z=-8},
+	max_pos = {x= 8, y=6, z= 8},
+	exptime=6,
 	size=12,
 	texture="weather_snow.png"
 }
 
+effects["climate_api:skybox"] = {
+	sky_data = {
+		type = "plain",
+		base_color = {r=106, g=130, b=142},
+		clouds = true
+	},
+	cloud_data = {
+		size = 0.98,
+		speed = {x = 4, y = 0, z = -1.3}
+	}
+}
+
 local function generate_effects(params)
 	local avg_humidity = 55
 	local intensity = params.humidity / avg_humidity
@@ -29,7 +45,7 @@ local function generate_effects(params)
 	}
 
 	override["climate_api:particles"] = {
-		amount = 50 * math.min(intensity, 1.5),
+		amount = 8 * math.min(intensity, 1.5),
 		falling_speed = 1 / math.min(intensity, 1.3)
 	}
 
diff --git a/ca_weathers/storm.lua b/ca_weathers/storm.lua
index 4d8325d..d0d55f9 100644
--- a/ca_weathers/storm.lua
+++ b/ca_weathers/storm.lua
@@ -1,9 +1,10 @@
 local name = "regional_weather:storm"
 
 local conditions = {
-	min_height = regional_weather.settings.min_height,
-	max_height = regional_weather.settings.max_height,
-	min_windspeed = 3
+	min_height 		= regional_weather.settings.min_height,
+	max_height 		= regional_weather.settings.max_height,
+	min_windspeed	= 3,
+	min_light			= 15
 }
 
 local effects = {}
diff --git a/init.lua b/init.lua
index 4c696de..4028fc7 100644
--- a/init.lua
+++ b/init.lua
@@ -20,6 +20,7 @@ regional_weather.settings.min_height	= get_setting_number("min_height", -50)
 
 -- import individual weather types
 dofile(modpath.."/ca_weathers/ambient.lua")
+dofile(modpath.."/ca_weathers/deep_cave.lua")
 dofile(modpath.."/ca_weathers/hail.lua")
 dofile(modpath.."/ca_weathers/pollen.lua")
 dofile(modpath.."/ca_weathers/rain.lua")
diff --git a/textures/weather_hud_ice.png b/textures/weather_hud_ice.png
new file mode 100644
index 0000000..e5ae6b9
Binary files /dev/null and b/textures/weather_hud_ice.png differ
diff --git a/textures/weather_hud_sand.png b/textures/weather_hud_sand.png
new file mode 100644
index 0000000..43e24f1
Binary files /dev/null and b/textures/weather_hud_sand.png differ