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Parameters

intermediate concepts

All settings live in the Global Snow component on the camera. The inspector starts with the Weather block, followed by seven foldouts. A dot after a label (for example Snow •) means that effect is on. Move the mouse over any label in the inspector to read a short description.

Weather

The top block holds one slider per effect, the Sun, the Profile and the quality Presets. Setting a slider to 0 turns that effect off.

Parameter	Description
Snow	Global snow amount. From 0 to 1 the snow fades in, from 1 to 2 it grows thicker. Default 1.
Snowfall	Density of the falling snowflakes. Range 0 to 4. 0 turns snowfall off. Default 0.1.
Snow Dust	Number of animated dust puffs near the ground, carried by the wind. It is not a transparency value. Range 0 to 1. 0 hides the dust. Default 0. Needs the Depth Texture option in the URP asset.
Frost	Hoarfrost ice on the ground and walls. Range 0 to 1. 0 turns it off. Default 0.
Camera Frost	Intensity of the frost on the camera view. It grows in from the edges of the screen as it rises. Range 0 to 1.5. 0 turns it off. Default 0.35.
Rain	How much it is raining: falling rain plus wet surfaces exposed to the sky. Range 0 to 1. Default 0.
Puddles	How much standing water the scene has. It works on its own, also without rain. Range 0 to 1. Default 0.
Camera Rain	Drops on the camera lens while it rains, scaled by Rain. Range 0 to 1. 0 turns it off. Default 0.
Sun	Directional light used for the snow lighting. If empty, Global Snow uses the first directional light it finds in the scene.
Profile	Optional Global Snow Profile asset with snow and rain settings to reuse. Assigning a profile applies it. Create makes a new profile from the current settings.
Profile > Revert	Loads the settings from the profile.
Profile > Apply	Saves the current settings into the profile.
Presets > Best	Relief Mapping, Coverage Quality 3, Running Drops at full resolution and Deep Marks on.
Presets > Medium	Normal Mapping, Coverage Quality 2, Running Drops at half resolution and Deep Marks on.
Presets > Fastest	Flat Shading, the lowest Coverage Quality the Coverage Extension allows, and Running Drops and Deep Marks off.

Coverage

Controls where snow can appear: layers, excluded objects, altitude, the top-down coverage capture, grass and the coverage mask.

Parameter	Description
Layer Mask	Layers that can receive snow. Objects on other layers get no snow. Objects on the Default layer are always included, so use the `Global Snow Ignore Coverage` component to exclude them. Refresh applies the change. Default: all layers.
Layer Mask > Default Exclusion Layer	Layer used internally to keep snow off excluded objects. Pick a layer that no object uses. Default 27.
Layer Mask > Exclusion Depth Bias	Depth comparison bias for excluded objects. Change it if snow shows at the borders of excluded objects. Default 0.99.
Layer Mask > Exclusion Double Sided	Enable it when you exclude double sided objects. Default off.
Layer Mask > Use Fast Exclusion Shader	Uses a fast mask shader to exclude objects. Disable it for objects with vertex animation, like trees or vegetation, so Global Snow uses their own material instead. Default on.
Use Fast Exclusion Shader > Default Cut Off	Alpha cut off used when excluding objects. The `Global Snow Ignore Coverage` component can set its own value per object. Range 0 to 1. Default 0.
Minimum Altitude	Snow level. There is no snow below this world height. Default -10.
Minimum Altitude > Altitude Range	Height in meters above Minimum Altitude where the snow appears in growing patches. Above that height only Scatter applies. 0 makes the snow start right at Minimum Altitude. Its effect fades out as Snow goes from 1.5 to 2. Default 0.
Use Zenithal Coverage	Computes the snow coverage automatically with a top-down capture, so surfaces under roofs, bridges or trees get no snow. Snowfall, rain and puddles also use it to stay out from under cover. Default on.
Use Zenithal Coverage > Zenithal Mask	Layers that take part in the top-down capture. Objects on top keep the snow off what is below them. Exclude particle systems and small moving objects. Default: all layers.
Use Zenithal Coverage > Coverage Update	When the coverage is captured again. Every Frame, Discrete (after the camera moves 50 meters), Manual (call `UpdateSnowCoverage()` from a script) or Disabled. Default Discrete.
Use Zenithal Coverage > Cull Mode	Normal respects the culling of each material. Both Faces also captures the back faces of single sided roofs, so they block snow, rain and puddles underneath. Default Normal.
Use Zenithal Coverage > Ground Coverage	Lets snow get under opaque objects. The snow fills in under the lowest covers, comes in patches under higher ones, and the highest stay clear. Range 0 to 0.5. Default 0.
Use Zenithal Coverage > Coverage Scatter	Width in meters of the snow scattered in patches outward from what covers the ground (trees, eaves, bridges). The snow layer thins toward the cover and snow never gets under it. It uses the Scale and Edge Softness of Scatter, and grows with the covers that Ground Coverage leaves clear. 0 gives a clean edge. Range 0 to 8. Default 0.
Add Snow To Grass	Replaces the URP terrain grass shader with a shader that supports snow. Stop and start the scene to see the change. Default off.
Grass Coverage > Altitude Offset	Height offset added to Minimum Altitude for terrain grass only. Default 0.
Grass Coverage > Coverage	Amount of snow on grass. Range 0 to 1. Default 0.75.
Coverage Extension	Size of the area around the camera covered by the top-down capture: 1 = 512 m, 2 = 1024 m, 3 = 2048 m, 4 = 4096 m. A larger area gives less detail. Default 1.
Coverage Quality	Resolution of the coverage texture: 1 = 512, 2 = 1024, 3 = 2048, 4 = 4096 pixels. With a Coverage Extension above 1, the quality is at least 2. Default 1.
Coverage Mask	Uses a texture to choose where snow appears. The mask also removes rain wetness and puddles, and limits the snow dust. Default off.
Coverage Mask > Texture (R)	Mask texture. Black means no snow, white means full snow. If the inspector warns about the import settings, click Fix Texture Import Settings.
Coverage Mask > World Size	World size covered by the mask texture. Usually it matches the terrain size. Default 2000 x 2000.
Coverage Mask > World Center	World position of the mask center. Use it to place the mask over a given area. Default 0, 0, 0.
Coverage Mask > Fill Outside Mask	Fills the area outside the mask with snow. Default on.

How coverage works: Global Snow adds the snow to the G-buffer during the deferred pass, so your materials stay as they are. A top-down camera captures the scene depth to find which surfaces are exposed to the sky, so roofs and bridges keep the snow off what is below. The Layer Mask decides which objects can receive snow, the Zenithal Mask decides which objects block snow below them, and the Coverage Mask and the Global Snow Ignore Coverage component give extra control per area and per object.

Mask Editor

The Mask Editor paints the coverage mask directly in the Scene View. Click and drag over objects that have colliders. It shows when a single Global Snow component is selected.

Parameter	Description
Enable Mask Editor	Turns on the brush in the Scene View. If Coverage Mask is off, a button offers to enable it.
Texture Size / Texture Path	Size and asset path of the current mask texture.
Resolution	Size in pixels of a new mask texture, from 256 to 8192. Higher values give more detail but paint slower. Default 1024.
Create New Mask Texture	Creates a mask texture asset filled with snow (`Assets/SnowMaskTexture.asset`) and assigns it.
Brush Mode	Add Snow or Remove Snow. Default Remove Snow.
Brush Mode > Width	Brush radius in world units. Range 1 to 128. Default 20.
Brush Mode > Fuzziness	Solid or spray brush. Range 0 to 1. Default 0.5.
Brush Mode > Opacity	Opacity of each stroke. Range 0 to 1. Default 0.25.
Fill Mask / Clear Mask	Fills the whole mask with snow, or removes all the snow.
Object Snower	A Mesh Renderer in the scene. The buttons below add or remove snow over the area it covers.
Object Snower > Padding	Extra border around the area of the object.
Object Snower > Opacity	Opacity of the fill. Range 0 to 1. Default 0.25.
Object Snower > Cover With Snow / Clear Snow	Adds or removes snow over the area of the object.

Snow Appearance

The look of the snow: shading detail, the snow layer, slopes, bare patches, color and lighting.

Parameter	Description
Complexity	Shading of the snow. Flat Shading is the fastest, Normal Mapping adds normal detail, Relief Mapping adds relief with depth. Default Relief Mapping.
Complexity > Relief Amount	Relief intensity. Only with Relief Mapping. Range 0.05 to 0.3. Default 0.3.
Complexity > Shade	How much the snow relief, the marks and the layer edges are shaded toward the sun, also in shadow. 0 uses only the scene lighting, above 1 is more dramatic. Not with Flat Shading. Range 0 to 3. Default 1.
Complexity > Glitter Strength	Sparkle on the snow. 0 turns it off. Not with Flat Shading. Default 0.75.
Thickness (m)	Thickness of the snow as a layer over the ground. It buries what rests in it, and Deep Marks dig into it as deep as it goes. 0 means no layer: the snow is drawn on the surfaces and only Footprints and Collision Marks mark it. Range 0 to 0.3. Default 0.15.
Slope Options > Threshold	Steepest slope where snow can stay. Range 0 to 1. Default 0.7.
Slope Options > Sharpness	Sharpness of the snow edge on slopes. Range 0 to 1. Default 0.5.
Slope Options > Noise	Random variation in the area between low and high slopes. Range 0 to 1. Default 0.5.
Slope Options > Deep Snow Cutoff	With Snow above 1, the steepest slope the extra snow fills. It compares the surface normal Y, so lower values reach steeper slopes. Range 0 to 1. Default 0.45.
Scatter	Share of the ground left bare in irregular patches. 0 leaves no bare patches, 1 leaves almost no snow. Its effect fades out as Snow goes from 1.5 to 2. Range 0 to 1. Default 0.
Scatter > Scale	Size in meters of the patches left by Scatter, Coverage Scatter and Ground Coverage. Shown when any of them is above 0. Range 1 to 32. Default 16.
Scatter > Edge Softness	Width of the slope where the snow layer thins down to the bare patches of Scatter, Coverage Scatter and Ground Coverage. 0.1 gives steep edges, 1 gives very gentle slopes and a much thinner layer on average. Shown when any of them is above 0 and Thickness is above 0. Range 0.1 to 1. Default 0.25.
Tint	Snow color tint. Default white.
Smoothness	How sharp the snow reflections are. Range 0 to 1. Default 0.9.
Minimum GI Ambient	Lowest ambient light on the snow. The snow takes the scene ambient light (Environment Lighting) and never goes below this value. Range 0 to 1. Default 0.2.
Maximum GI Ambient	Highest ambient light on the snow. Lower it to darken the snow when the scene ambient light is very bright. Range 0 to 4. Default 0.5.
Normals Texture	Normal map for the snow detail. Not with Flat Shading. If empty, the bundled texture is used.
Normals Strength	Strength of the snow normal map. Range 0 to 2. Default 1.
Noise Texture	Noise texture that adds variation to the snow. If empty, the bundled texture is used.
Noise Texture Scale	Tiling of the noise texture. Lower values give larger, smoother patterns. Default 0.1.

Footprints & Marks

Everything that marks the snow. Deep Marks dig into the snow layer. Surface Marks (Footprints and Collision Marks) are drawn on the snow. The Common options apply to all of them. Marks also ripple the puddles when Contact Ripples is on (see Rain & Water).

Deep Marks

Deep Marks work in Play mode and need a Thickness above 0 in Snow Appearance. Objects with Global Snow Interaction (characters, physics objects and vehicles on wheel colliders) and sources added by script dig real marks into the snow layer, on any ground, roof or object they rest on.

Parameter	Description
Enabled	Turns on Deep Marks. Footprints and Collision Marks keep marking the snow where there is no deep mark. Default off.
Softness (m)	Smallest detail the snow keeps. The edges of the marks crumble at the same scale. Range 0 to 0.03. Default 0.012.
Rim	Snow pushed up along the edges of the marks. Range 0 to 2. Default 0.5.
Rim Noise	Irregularity of the rim. Range 0 to 1. Default 0.35.
Shadow	Strength of the shadow cast by the walls of the marks. 0 turns it off and skips its cost. The quality presets set it: 0.3 for Best and Medium, 0 for Fastest. Range 0 to 1. Default 0.3.

Surface Marks

Footprints and Collision Marks are drawn on the snow. If Coverage Update is set to Disabled, the inspector warns that they may not render correctly.

Parameter	Description
Footprints > Enabled	Turns on footprints. Characters with the `Global Snow Interaction` component leave a footprint per foot. Default off.
Footprints > Texture	Sole texture stamped at each footprint. If empty, the bundled sole is used.
Footprints > Duration	Seconds before the footprints fade out completely. Range 1 to 240. Default 60.
Footprints > Scale	Footprint size: world meters covered by each footprint. Increase it to make the footprints larger. Range 0.04 to 1. Default 1.
Footprints > Obscurance	Makes the footprints darker. Range 0.05 to 0.5. Default 0.1.
First Person > Mode	Footprints left by the camera (or the Ray Origin) as it moves, one sole per step on alternate sides. None: only characters with Global Snow Interaction leave footprints. Character Controller: steps count while the Character Controller is grounded. Ray Cast: a ray down to the ground checks each step. Default Ray Cast.
First Person > Character Controller	Character Controller used to know if the player is grounded. If empty, Global Snow looks for one in the hierarchy of the camera.
First Person > Ray Origin	Ray Cast mode. Transform used for the movement and the ground ray. If empty, the camera is used.
First Person > Max Ground Distance	Ray Cast mode. Maximum distance from the ray origin to the ground. Default 1.
Collision Marks > Enabled	Marks drawn on the snow where objects with `Global Snow Interaction` touch it, and by `MarkAt()` and `MarkTrail()`. Nothing is needed on the ground. Default off.
Collision Marks > Default Size	Size of the marks made by automatic collisions. Call `MarkAt()` to set a custom size. Range 0 to 1. Default 0.25.
Collision Marks > Width Multiplier	Makes the collision marks wider. Plow Mode trails ignore it, since their width comes from the contact. Default 1.
Collision Marks > Dig Depth (m)	Visual depth a mark digs on plain terrain. Plow Mode objects also use it to get the width of their trail. Default 0.15.
Collision Marks > Extents	Size of the internal texture that holds the collision marks: 512, 1024, 2048, 4096 or 8192. Default 2048.
Collision Marks > View Distance	Maximum distance from the camera where collision marks render. Reduce it if marks repeat, or increase Extents. Range 0 to 1024. Default 200.
Collision Marks > FPS Marks	Adds marks automatically when the camera moves. Use it only with a first person camera. Default off.
Collision Marks > Max Step	Maximum distance an object can move between two frames and still leave a continuous trail. Default 20.
Collision Marks > Min Roof Distance	Minimum distance from the mark to a roof above it. Use it to control when collision marks appear under a roof. Default 0.5.

Common

Parameter	Description
Duration	Seconds that Deep Marks and Collision Marks take to fill back in. Footprints have their own Duration. Shown when Deep Marks or Collision Marks are on. Range 1 to 240. Default 180.
Impact FX	Snow burst particles when feet, colliders or `EmitImpactFX()` hit the snow. They show in Play mode, in view of the camera and within 30 m, where the point has snow and no standing water, when Snow is above 0.5, at full strength from Snow 1. Wet snow (Snow Wetness or rain) throws less powder and a few bigger chunks. Default on.
Impact FX > Intensity	Strength of the impact particles. Range 0 to 2. Default 1.
Compaction	Extra smoothness of the pressed snow inside the marks. Default 0.25.
Dirt Reveal	Marks that reach the ground show dirt. When off, they show pressed snow. Default on.
Dirt Reveal > Dirt Floor (m)	Marks whose floor keeps less snow than this height over the ground show the dirt. 0 shows it only in the marks that reach the ground; an object with Sink Depth 1 always reaches it. Range 0 to 0.3. Default 0.02.
Dirt Reveal > Dirt Blend	0 gives a hard edge at the Dirt Floor. 1 fades the dirt in from the Dirt Floor down to the bare ground. Range 0 to 1. Default 1.
Dirt Reveal > Dirt Color	Ground color shown by the marks. Alpha controls the intensity.
Dirt Textures > Extract From Material	Pick a material that uses the URP Lit property names and click Extract to copy its albedo, normal and height maps, its smoothness and its normal strength into the slots below.
Dirt Textures > Albedo	Ground albedo, tiled in world space. If empty, the bundled gravel textures are used.
Dirt Textures > Normal Map	Normal map of the ground.
Dirt Textures > Height Map	Breaks up the edge between snow and dirt: the high parts of the ground (pebbles, roots) show first.
Dirt Textures > Tiling (m)	World size of one texture repeat. Default 2.
Dirt Textures > Normal Strength	Strength of the ground normal map. Range 0 to 2. Default 1.
Dirt Textures > Smoothness	Smoothness of the ground. Range 0 to 1. Default 0.2.

Snowfall, Dust & Wind

Procedural snowfall around the camera, snow dust near the ground and the wind they share with the rain. The amount of snowfall and snow dust is set with the sliders in the Weather block. Flakes do not fall under roofs seen by the top-down capture. Snow Dust needs the Depth Texture option in the URP asset, and the inspector shows an error when it is off.

Snowfall, Dust and Wind foldout of the Global Snow inspector

Parameter	Description
Snowfall > Presets	One click weather looks, from calm flurries to a whiteout blizzard: Soft, Light, Moderate, Heavy and Blizzard. Each one sets the snowfall amount and look, the snow dust and the wind speed.
Snowfall > Fall Speed	Fall speed in meters per second (0.5 for light flakes, 1 to 2 for heavy snow). Small flakes fall slower and follow the wind more than large ones. Range 0.1 to 3. Default 1.
Snowfall > Weight	Resistance to wind and flutter. 1 keeps the normal motion, 2 halves the sideways response. It does not change Fall Speed, the wind or the snow dust. Range 1 to 10. Default 1.
Snowfall > Emission Distance	Size of the flake volume around the camera. Reduce it to concentrate the snowfall. Range 10 to 200. Default 100.
Snowfall > Use Illumination	Flakes catch light coming from the sun direction. Default off.
Snowfall > Flake Size	Base flake size in meters. Range 0.01 to 0.1. Default 0.06.
Snowfall > Brightness	Flake color multiplier. Above 1 pushes the flakes past white for bloom. Range 0.5 to 3. Default 1.
Snowfall > Crispness	0 keeps the soft default look. Higher values make the flakes smaller and more solid. Range 0 to 1. Default 0.
Snowfall > Whiteout	Distance haze that fades the scene to white, for blizzards. Range 0 to 1. Default 0.
Snowfall > Flutter	Sideways drift as the flakes fall. Above 0.5 it adds a chaotic swirl for blizzards. Range 0 to 1. Default 0.35.
Snowfall > Streaks	How much a flake stretches along its motion, like in a camera exposure. Visible mostly with wind. Range 0 to 1. Default 0.5.
Snowfall > Density Waves	Bands of thicker and thinner snowfall that travel with the wind. Range 0 to 1. Default 0.5.
Snow Dust > Lift	Vertical offset of the puff centers from the ground, in meters. Negative values lower the volume. Range -5 to 5. Default 0.
Snow Dust > Puff Size	World size of the puffs in meters. Range 0.05 to 20. Default 1.5.
Snow Dust > Max Height	Maximum height of the puff centers above the ground, before adding Lift. Range 0.02 to 15. Default 0.1.
Snow Dust > Range	Width of the dust volume around the camera in meters, with a soft border. Range 40 to 120. Default 80.
Snow Dust > Shelter Blur	Radius in meters used to soften the shelter detection around roofs and obstacles. Range 2 to 20. Default 8.
Snow Dust > Shelter Fade	Transition distance in meters at the shelter borders. Larger values also slow down visibility changes. Range 1 to 20. Default 6.
Snow Dust > Soft Intersection	Distance in meters over which the puffs fade near solid geometry. Range 0.01 to 5. Default 1.
Wind > Source	Manual uses the Speed and Direction below. Wind Zone reads a WindZone in the scene, so trees, snowfall, snow dust and rain share one wind. Default Manual.
Wind > Wind Zone	Wind Zone source. A directional WindZone sets the direction with its forward axis and the speed with its Main strength. A spherical zone only sets the speed. If empty, the manual speed and direction are used.
Wind > Speed Scale	Wind Zone source. Meters per second of wind per unit of WindZone Main strength. The inspector also shows the current wind. Range 0.1 to 20. Default 5.
Wind > Speed	Manual source. Horizontal wind speed in meters per second, shared by snowfall, snow dust and rain. Range 0 to 20. Default 0.
Wind > Direction	Manual source. Direction the wind blows toward, in degrees: 0 = +X, 90 = +Z, 180 = -X, 270 = -Z. Default 0.
Wind > Gustiness	Strength of the wind gusts on snowfall and snow dust. Range 0 to 1. Default 0.6.

Frost

Frost covers the ground and the lower part of walls with hoarfrost ice. Camera Frost adds frost to the camera view. Their amounts are the Frost and Camera Frost sliders in the Weather block.

Parameter	Description
Frost > Wall Height	How high the frost climbs walls, in meters, counted from the ground in front of each face. Faces sheltered from the sky stay free of frost. At the maximum, everything freezes, roofs and ceilings included. Range 0.1 to 20. Default 1.5.
Frost > Patch Scale	Scale of the frost patches when Frost is below 1. Higher values give smaller patches. The size of the ice detail is set by Ice Tiling. Range 0.05 to 2. Default 0.35.
Frost > Ice Color	Ice detail texture. Its bright areas become plate rims, cracks and frost specks. If empty, the bundled texture is used.
Frost > Ice Roughness	Roughness map of the ice detail. If empty, the bundled texture is used.
Frost > Ice Tiling	Ice detail repeats per meter. Range 0.02 to 2. Default 0.25.
Frost > Glaze	How much the ice darkens the surface below, like a wet glaze. Range 0 to 1. Default 0.5.
Frost > Reflectivity	Strength of the ice reflections: 0.5 for matte frost, 1 for real ice, 2 for a mirror pond. Range 0.5 to 2. Default 1.
Frost > Veins	Whiteness of the plate rims, cracks and frost specks. Range 0 to 2. Default 0.5.
Frost > Ice Smoothness	Glossiness of the ice plates. Range 0 to 1. Default 0.95.
Camera Frost > Spread	Shape of the frost edge: low values let the frost reach the center of the screen sooner, high values keep it along the borders until the intensity is high. Range 1 to 5. Default 1.2.
Camera Frost > Distortion	How much the frost refracts the view behind it. Range 0 to 1. Default 0.25.
Camera Frost > Tint Color	Tint color of the camera frost. Default white.

Rain & Wetness

Falling rain, wet surfaces, running drops and puddles. The amount of rain and of standing water is set with the Rain and Puddles sliders in the Weather block. Some options show only when Rain or Puddles is above 0. See Rain & Water for how they work together.

Rain and Wetness foldout of the Global Snow inspector

Parameter	Description
Rain > Speed	Fall speed multiplier of the rain. Shown when Rain is above 0. Range 0.5 to 1.5. Default 1.
Rain > Streak Length	Length multiplier of the rain streaks. Range 0.5 to 1.5. Default 1.
Rain > Contrast	How visible the falling drops are, without changing the amount of rain. 1 keeps the streaks visible on bright sky or snow. At 0 the drops only bend the view behind them, like small lenses. Range 0 to 1. Default 1.
Snow Wetness	Wet or melting snow look: darker, smoother, softer normals and no sparkle. Rain also wets the snow exposed to the sky on its own. This value is the minimum, applied everywhere, also under cover. Range 0 to 1. Default 0.
Wall Wetness	How wet walls and other steep surfaces are on their own, rain or not. Rain adds to it, and wind also wets the walls that face it under small roofs, up to 1.5 m in. Range 0 to 1. Default 0.
Running Drops	Beads that appear on wet surfaces, run down under gravity, merge and leave trails. They show near the camera only, and they are the heaviest part of the rain. Default on.
Running Drops > Wall Drops	How many running drops appear on walls and other steep surfaces, compared with flat ground. Higher values give more drops on walls. Range 0 to 1. Default 0.35.
Running Drops > Half Resolution	Draws the running drops at half resolution. About half the cost, with softer drops. Default off.
Running Drops > Contrast	How much the running drops stand out. At 1 they also darken bright surfaces such as snow. At 0 they only show reflections and sun glints. Range 0 to 1. Default 1.
Puddles Scale	Scale of the procedural puddle pattern. Higher values give smaller, more isolated puddles. A Puddle Mask uses its own Mask World Size instead. Shown when Puddles is above 0. Range 0.1 to 8. Default 1.
Contact Ripples	Strength of the ripples that footprints, marks and impacts leave on the puddles. 0 turns them off. Range 0 to 2. Default 1.
Rain Ripples	Strength of the rings that rain drops leave on the puddles. 0 turns them off. Range 0 to 2. Default 1.
Puddle Mask	Optional texture mapped on the world that chooses where puddles can form (red channel). White areas get puddles first, black areas never get puddles. Without a mask, procedural patches are used.
Puddle Mask > Mask World Size	World meters covered by the puddle mask. The area outside the mask stays dry. Default 512.
Puddle Mask > Mask World Center	World X and Z position of the center of the puddle mask. Default 0, 0.
Camera Rain	Drops on the camera lens while it rains, scaled by Rain, so it needs Rain above 0. More drops land when the camera faces the rain or moves into it, and few with its back to the rain or looking down. The drops grow in the rain and, once they are heavy enough, run down with the slant of the rain without stopping until they leave the lens, joining other drops and leaving wet trails that dry. When the camera turns, the drops and trails already on the lens stay where they are. Under a roof no new drops land and the ones on the lens dry out. Only on the camera with Global Snow, never in the Scene View. Also in the Weather block. Range 0 to 1. Default 0.
Camera Rain > Drop Size	Size of the drops on the lens. Smaller drops bend the view the same way, only over a smaller area. Range 0.5 to 2. Default 1.
Camera Rain > Distortion	How much the drops bend the view behind them. Range 0 to 1. Default 0.5.

Tools & Debug

Scene View preview, a split view to compare the scene with and without Global Snow, and debug views.

Tools and Debug foldout of the Global Snow inspector

Parameter	Description
Show In Scene View	Renders the snow in the Scene View. Default on.
Compare	Split view: one side of a line shows the scene without Global Snow. Default off.
Compare > Same Side	Both sides show the same view: a copy of the game camera renders the scene without Global Snow. Game camera only, the Scene View keeps the split. Default off.
Compare > Panning	Shown with Same Side. Shifts the view along the split so you can center the area you compare. Range 0 to 0.5. Default 0.25.
Compare > Line Angle	Angle of the split line in degrees, from -180 to 180. Default 80.
Compare > Line Width	Thickness of the split line as a fraction of the screen. Range 0.0001 to 0.05. Default 0.002.
Show Coverage Boundary	Shows a rectangle in the Scene View around the coverage area. Shown when Use Zenithal Coverage is on. Default off.
Show Coverage Depth	Shows the top-down coverage depth texture in the inspector. Not shown when Coverage Update is Disabled. Default off.
Update Coverage Now	Button shown in Play mode. Captures the coverage again.
Rain Debug View	None. Impact Rings shows the rain impact field as brightness. Running Drops Receiver shows where running drops can appear: black where they cannot appear, gray where they can. Default None.

Next Steps

Rain & Water - how rain, wetness, puddles, ripples and running drops work together.
Additional Topics - footprints, deep marks, exclusions, coverage mask and profiles.
Scripting Support (C#) - runtime API reference.

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