Node Reference

Complete reference for all nodes available in the 2D Terrain Graph and 3D Terrain Graph editors. Nodes are organized by category.

Sampler Nodes

Generate base noise or height values. These are typically the starting point of any graph.

Noise 2D / Sample Height Map Fractal

Procedural fractal noise evaluated at (X, Z) world coordinates. Y-independent, benefits from column caching.

Parameter	Description
Frequency	Scale of the noise pattern. Lower values = larger features.
Octaves	Number of noise layers (1-8). More octaves = more detail, higher cost.
Persistence	Amplitude decay per octave. Lower = smoother terrain.
Lacunarity	Frequency multiplier per octave. Default 2.0.
Min / Max	Output range remapping.

Noise 3D

3D fractal Perlin noise evaluated at (X, Y, Z). Produces values that vary with altitude, essential for caves and volumetric features. 3D graph only.

Same parameters as Noise 2D. Higher computational cost since it cannot use column caching.

Noise 2D Ridge / Noise 3D Ridge

Ridge noise variant: applies 1 - 2 * |noise - 0.5| to create sharp ridgeline patterns. Good for mountain ranges and jagged terrain.

Sample Height Map Texture

Samples a repeating 2D texture as a heightmap. Remaps grayscale value to Min/Max range.

Parameter	Description
Noise Texture	Texture2D asset to sample (tiled)
Frequency	Tiling frequency
Offset	X/Z offset for the sample position

Sample Height Map Unity Terrain

Reads height values from a Unity TerrainData asset. Useful for importing existing terrain designs into Voxel Play.

Constant

Outputs a fixed value. Supports Normalized (0-1), Percentage (0-100) and Meters unit modes.

Random

Deterministic pseudo-random value based on world X/Z position. Always outputs 0-1.

World X / World Y / World Z

Output the normalized world coordinate (position / maxHeight). World Y is critical for 3D terrain - it provides the vertical position for height-based density. 3D graph only.

Terrain Shapers

Transform density values into terrain features. 3D graph only.

Height Gradient

The fundamental 3D terrain node. Adds a vertical gradient that makes terrain solid below a base height and air above it.

Parameter	Description
Base Height	Normalized height (0-1) where surface forms. 0.3 = surface at 30% of max height.
Gradient Strength	How sharply density changes with altitude. Negative values = solid below, air above (standard terrain).

Formula: output = input + (y - baseHeight * maxHeight) * gradient / maxHeight

Island 3D

Radial falloff from world origin. Subtracts density beyond the specified radius, creating island boundaries.

Parameter	Description
Radius	Island radius in world units
Slope Multiplier	Falloff steepness beyond the radius

Terraces / Terraces 3D

Quantizes values into stepped bands, creating terrace formations.

Parameter	Description
Steps	Number of terrace levels (2-64)
Smoothness	Blend between sharp and smooth terrace edges (0-1)
Strength	Blend between original input and terrace effect (0-1)

Cave Carver

Generates swiss-cheese cave networks by subtracting density where 3D noise exceeds a threshold. 3D graph only.

Parameter	Description
Frequency	Cave network scale
Octaves	Detail layers for cave shape
Threshold	Minimum noise value to carve (higher = fewer caves)
Carve Strength	How much density is removed

Math Nodes

Transform a single input value. Available in both 2D and 3D graphs.

Node	Formula	Use case
Shift	input + value	Raise or lower terrain
Invert	1 - input	Swap valleys and peaks
Add And Multiply	(input + a) * m	Offset then scale
Multiply And Add	(input * m) + a	Scale then offset
Exponential	input ^ exp	Sharpen peaks (exp > 1) or flatten (exp < 1)
Abs	|input|	Create ridges from signed noise
Remap	Linear map from [a,b] to [c,d]	Rescale any range
Clamp	clamp(input, min, max)	Limit output range
Flatten Or Raise	Modify slope above threshold	Create plateaus and mesas

Mask By Y

Restricts a value to a vertical band. Outside the band, outputs a fixed value. 3D graph only.

Parameter	Description
Y Min / Y Max	Vertical range where the input passes through
Outside Value	Value used outside the range
Fade	Smooth transition distance at the boundaries (0 = hard cut)

Blend Nodes

Combine two inputs (A and B). Available in both 2D and 3D graphs.

Node	Formula
Blend Additive	A * weightA + B * weightB
Blend Multiply	A * B
Min	min(A, B)
Max	max(A, B)
Subtract	A - B
Divide	A / B (safe, returns 0 if B near zero)
Smooth Min	Smooth organic blend with K factor. 3D only.

Filter Nodes

Conditional operations based on value ranges or thresholds.

Threshold

Compares input against a threshold. If greater or equal: adds a value. If less: outputs a fixed value.

Select

Pass-through filter: if input is within [Min, Max], output it unchanged. Otherwise output a fixed value.

Fill

If a reference input is within a range, output a fill value. Otherwise pass through the main input.

Test

Boolean test: outputs 1 if input is within [Min, Max], otherwise 0. Useful for masking.

Beach Mask

Special filter that suppresses beach generation where a mask value exceeds a threshold. 2D graph only.

Discard

Always outputs zero (air). Use with conditional nodes to create empty regions. 3D graph only.

Biome Node

Climate Map

Looks up the biome index from the World Definition's biome array based on altitude, moisture and temperature inputs.

Input	Description
Altitude	Normalized height (0-1)
Moisture	Humidity value (0-1)
Temperature	Optional third axis (0-1) for VP4's 3-axis biome selection

Output: biome index (0..N) matching the first biome whose altitude/moisture/temperature ranges contain the input values. Connect to Voxel ID, Vegetation ID or Tree ID terminals.

Utility Nodes

Copy

References the output of another node. Useful for reusing a result in multiple branches without recalculating.

Island (2D)

Distance-based falloff from world origin. Reduces height values outside a radius, creating finite island worlds. 2D graph only.