Siberia Frozen Lakes & River Plains Real-World Terrains 264 km²

• Heightmaps - 36 maps, 16-bit greyscale PNG, 8129 x 8129 px, 2 m per pixel (16,256 m per side, 264 km²)
• Relief - 36 m to 323 m; the lowest point of every map sits at 0
• Terrains - 2 x 2 Unity terrains of 4097 samples per map (8,192 m tiles) sharing their edge samples; terrain holes trim the unused strip
• Precision - Unity's 32,767 height levels: 1.1 mm (lowest relief) to 9.8 mm (highest relief) per level
• Demo - 3 map prefabs that work in every pipeline, 9 scenes, low sun at 13 degrees in the south
• Ground - 8 midwinter layers, 4096 x 4096 colour/smoothness, normal and mask
• Frozen water - lakes and wide rivers found from smooth level ground, painted as clear ice, white ice and snow; no water surfaces
• Painter - wind, shelter, crests, hollows, slope, sun side, roughness, drainage and tree line from the terrain shape; any terrain, restore button
• Material - hex-tile stochastic sampling, several distance scales, 4-scale variation, side projection, world-space sastrugi and ice cracks - Built-in, URP, HDRP
• Tools - Terrain Builder, Project Setup, Siberia Winter Ground painter, PDF manual
• Engine - Unity 2022.3 and above

▶ Fly over the frozen lakes in 4K: https://youtu.be/ca2tmM6JYLo

​36 real-world maps of Siberia's lake lowlands and river plains in deep midwinter - 264 km² each at 2 m per pixel

Flat, wind-swept country in Russia - Siberia: thermokarst lake lowlands where a single map can hold dozens of frozen lakes, open tundra plains, and wide meandering rivers frozen from bank to bank. Made from real-world elevation data (DEM) with 36 m to 323 m of relief per map, and rebuilt in Unity pixel for pixel.

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✦ FROZEN WATER, FOUND IN THE TERRAIN ITSELF

• Frozen lakes - smooth level ground is found in the terrain's own shape and painted as ice: the wind keeps lanes of clear blue-black ice bare between snow dunes
• Wide frozen rivers - white rough ice under wind-packed snow, held between the real banks of every meander
• Crack nets - white contraction cracks run through the clear lake ice; the ice is glossy, the snow beside it matte
• Ground textures only - no water surfaces, no plant or object meshes: everything is painted on the terrain

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✦ IN THE PACKAGE

• 36 heightmaps - 16-bit greyscale PNG, 8129 x 8129 px, 16,256 m per side, the lowest point of each map at height 0
• Exact Unity terrains - each map builds as 2 x 2 terrains of 4097 samples that share their edge samples; nothing is resampled
• 9 demo scenes - Great Frozen Lake, Thermokarst Lake Lowland and Frozen River Meanders, each in Built-in, URP and HDRP
• Terrain Builder - builds any of the 36 heightmaps in one click, at full, half or quarter detail
• Eight 4K ground layers - Powder, ThinSnow, BlueIce, WhiteIce, DarkRock, PaleRock, WindSlab and Kurum

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✦ A WINTER PAINTER FOR ANY TERRAIN

• One window - Tools > Lidar Terrains > Siberia Winter Ground > Paint Selected Terrains... paints the other 33 maps, or a terrain of your own
• Reads the shape - wind exposure and shelter, crests and hollows, slope, roughness, drainage and level water decide where each layer lies
• Wind From - choose the wind direction: the ice lanes, the snow dunes and the sastrugi (wind-carved snow ridges) turn with it
• Bare Ice and River Ice - set how much of a lake stays clear and how much white ice a river shows
• Safe to try - Restore Terrains Before The Last Paint brings the earlier ground back at any terrain size

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✦ NO TILES ON WIDE WHITE GROUND

Flat snow and lake ice show texture repeats sooner than any other ground. The material reads every layer with hex-tile stochastic sampling at several distance scales, adds ground variation at four scales and draws the sastrugi in world space along the wind - in Built-in, URP and HDRP alike.

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✦ LIGHT AND SPEED

• Low winter sun - the demo scenes are lit from 13 degrees above the horizon in the southern half of the sky, with long blue shadows
• Native 4K - player builds at 3840 x 2160 without upscaling on an RTX 3090: HDRP 148-153 FPS · URP 148-159 FPS · Built-in 235-253 FPS

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✦ GOOD TO KNOW

Unity 2022.3 and above. One package holds the Built-in, URP and HDRP content. Unity stores terrain heights in 32,767 levels - on these low maps one level is only 1.1 to 9.8 mm. Nothing in this pack obliges you to credit anyone.

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✦ MORE OF MIDWINTER SIBERIA

• Taiga Uplands & Plateaus - deep powder, wind-packed tops and dark rock steps: https://assetstore.unity.com/packages/slug/429846
• Mountain Valleys - powder-filled valley floors between the ranges: https://assetstore.unity.com/packages/slug/429848
• High Ranges - ridges, couloirs and rock walls: https://assetstore.unity.com/packages/slug/429850