Parameters

APLM exposes 24 primary variable categories per layer. Every biome and every base material exposes the same set, so once you learn the vocabulary on one surface, you know it on every surface.

These parameters live in the Material Instance, in the category named after the layer (for example Biome Tundra or Base Grass). The special parameters, weather parameters, and season parameters are documented separately and live in their own categories.

Tip

BP_APLMController and the shipped Blueprint structs let you push these values from data assets at runtime, useful for procedural variety, gameplay events, or save/load.

Per-surface parameters

Parameter	Effect
T2DA: Texture 2D Array	Slot for the Texture2DArray that supplies BaseColor, Normal, and ORD/ORH for this layer.
Color	Adds color to the texture. Does not replace the texture’s color.
Offset	Strongly alters the texture’s color. Use carefully.
Gain	Increases the intensity of the texture’s appearance.
Brightness	Increases brightness.
Contrast	Increases contrast.
Saturation	Increases saturation.
Near Tilling	Texture tiling at near viewing angles.
Far Tilling	Texture tiling at far viewing angles.
Fade Length	Distance over which texture tiling transitions from near to far.
Fade Offset	Blend bias between near and far tiling.
Enable Texture Variation	Toggles the texture variation system.
Variation Scale	Size of the variation pattern (when texture variation is enabled).
Variation Level	Strength of the variation pattern (when texture variation is enabled).
Enable Triplanar	Toggles triplanar mapping.
Variance Low	Lower range of the texture variance.
Variance High	Upper range of the texture variance.
Variance Strength	Strength of the texture variance.
Specular	Specular value.
Roughness	Roughness value.
Normal Strength	Normal map strength.
Normal Flatness	Flatness of the normal.
Displacement Intensity	Displacement strength. Requires Nanite-enabled landscape.
Height Blend	Height value used for height-based blending against neighbouring layers.

How the parameters compose

• Color block (Color, Offset, Gain, Brightness, Contrast, Saturation): post-process color correction on top of the BaseColor slice. Each parameter is independent.
• Tiling block (Near Tilling, Far Tilling, Fade Length, Fade Offset): the material samples the texture twice (once at near tiling, once at far) and blends between them across distance to hide tiling at long view distances.
• Variation block (Enable Texture Variation, Variation Scale, Variation Level): an optional secondary noise that breaks up large-scale repetition.
• Triplanar block (Enable Triplanar): when enabled, the material projects the texture from three world axes and blends, removing UV stretching on steep slopes.
• Variance block (Variance Low, Variance High, Variance Strength): per-pixel variance that adds local color noise. Cheap.
• Surface block (Specular, Roughness, Normal Strength, Normal Flatness): standard PBR surface controls applied on top of the textured values.
• Displacement block (Displacement Intensity, Height Blend): for Nanite landscapes, displacement strength and the height value used in cross-layer blending.

Where to next

• Special parameters: cross-cutting parameters that shape the whole landscape (beach height, snow height, gravel blend tunables).
• Weather parameters: per-material weather controls.
• Season parameters: per-biome seasonal overrides.