Material Nodes

PPG material expressions appear in the PPG material node category, with water nodes under PPG|Water and biome map sampling under PPG|Biomes.

Position and UV Nodes

Node	Purpose
Planet Position	Returns a chunk-stable float direction from the planet center for generation and biome-mask graphs. It can optionally apply Planet Position Scale.
Planet Position LWC	Returns per-pixel LWC planet-local position for precision-sensitive surface mapping. Use Planet Position, not this node, with PPG generation noise.
Planet UVs	Generates planet surface UVs. Useful for high-precision surface material mapping.
Planet Warp Position	Warps a planet-space position, usually before noise or biome lookup.

Noise and Height Nodes

Node	Purpose
Planet Noise	Generates FBM, craters, Voronoi, erosion, or tectonic-plate noise. Available properties and outputs change with the selected mode.
Planet Global Height	Returns global terrain height.
Planet Flatten Elevation	Flattens elevation near water level.
Planet Elevation Output	Outputs global height plus per-biome terrain heights for generation.

Planet Noise Modes

Mode	Notes
FBM (Gradient + Rotation)	General fractal terrain with octave and ridge controls.
Craters	Multi-scale crater field with lacunarity, jitter, depth, and edge rounding.
Voronoi	Cellular noise.
Erosion	Erosion-filtered terrain with 2D biome-cell or 3D triplanar mapping. It returns a packed Height, Delta, Ridge value.
Tectonic Plates	Plate-style large-scale structure.

Base Frequency applies to every mode. Octaves applies to FBM, craters, and erosion. The details panel hides mode-specific properties that do not affect the selected noise type.

Biome Nodes

Node	Purpose
Planet Biome Mask Output	Outputs biome mask values used to bake the biome-cell map.
Planet Biome Map Sample	Owns the fixed per-chunk BiomeMap texture parameter and returns the three strongest biome IDs and strengths. It requires no texture input.
Planet Biome Material Output	Blends per-biome Material Attributes from IDs and strengths produced by Planet Biome Map Sample.
Planet Biome Strengths	Converts the sampled top-three IDs and strengths into named 0-1 biome masks.
Planet Cell Origin	Returns the current biome cell origin.
Planet Cell Position	Returns position relative to the current biome cell.
Planet Biome Cell Position 2D	Returns 2D position in the current biome cell.

Vertex Color and Curve Nodes

Node	Purpose
Planet Vertex Color Output	Outputs per-biome vertex colors for terrain generation.
Planet Curve Atlas Row	Samples a curve atlas row with integer row addressing to avoid tiny precision stair steps.

Water Nodes

Node	Purpose
Planetary Water Shading	Shades planetary water using light direction, water depth, scattering, absorption, normals, view direction, and horizon-aware ambient controls.
Planetary Underwater Post Process	Applies underwater post-processing using scene color, water path length, underwater mask, camera depth, light direction, and water optical coefficients.

Required Output Nodes

Material	Required Node
Biome mask material	One Planet Biome Mask Output.
Generation material	One Planet Elevation Output and one Planet Vertex Color Output.
Surface material	Planet Biome Map Sample connected to Planet Biome Material Output when using biome-specific Material Attributes.

Biome Surface Wiring

In the surface material:

Source	Destination
Planet Biome Map Sample output Biome IDs	Planet Biome Material Output input Biome IDs
Planet Biome Map Sample output Strengths	Planet Biome Material Output input Biome Strengths
Per-biome Material Attributes	Matching named biome inputs on Planet Biome Material Output

To use individual biome masks, connect the same Biome IDs and Strengths outputs to Planet Biome Strengths inputs Planet Biome IDs and Biome Strengths. Set its Biome Count and entry names to the Planet Data biome names, then use its named scalar outputs elsewhere in the surface graph. Missing and non-contributing biomes output zero.

Planet Biome Mask Output owns biome cell resolution/seed. Planet Elevation Output owns transition, height blend, and biome-warp controls. Rebuild the planet pipeline after changing them.

Use one Planet Biome Map Sample for all consumers in a surface material. Separate sample nodes repeat the per-pixel texture sampling and biome sorting work.