BP_Biome icon

SubBiome

Spawn and Manage SubBiomes

BP_SubBiome — Spawns spline-driven PCG features such as roads, farmlands, and forest strips. SubBiomes are generated along a spline (or multiple splines, e.g., farmlands where splines represent garden rows). SubBiomes don`t require Biome, they are generated independently, while still supporting clean blending.

Biome preview
Details options are context-specific. Different sub-biomes may have different categories expanded or collapsed.
Biome
Biome preset
Data Table Dropdown
Biome presets and parameters are stored in data tables. For more info visit Biome Presets.
Row Name Dropdown
SubBiomes offer multiple presets. Select the preset you want to use here.
Biome Quality Dropdown
Defines the biome generation quality level. This setting influences foliage density, draw distance, WPO usage, shadowing behavior, and global illumination. High preset targets ~ 80–90 FPS on an RTX 4090 at 4K resolution with 50% Epic scalability. The Cinematic preset uses the same foliage density as High, but without mesh culling. Lowest disables WPO.
Advanced
Runtime Generation Checkbox
EXPERIMENTAL FEATURE. Forces all meshes to spawn at runtime instead of being stored in the level, significantly improving loading times.
Spawn Proxy And HLOD Checkbox
Replicates HLOD behaviour when Runtime Generation is disabled and sends proxies to the HLOD spawner when enabled.
Seed Value
Affects generation outcome. Each seed produces a different layout.
Spline
Accuracy Slider
Defines sampling precision along the spline for tighter turns or wider rows.
Double Resample Checkbox
Performs an additional resample pass for smoother overall shape. Helps reduce knots.
Spawn Options
Garden
Rows Value
Number of rows to the one side from the center in the garden layout.
Row Distance Value
Spacing between each row.
Garden Bed Checkbox
Enables garden bed generation.
Border Checkbox
Toggles border creation around the garden.
Border Width Slider
Width of the generated border.
Plants
Amount Slider
Plants amount.
Distance Value
Spacing between individual plants.
Scale Slider
Base scale multiplier for plants.
Position Random Slider
Adds positional randomness to plant placement.
Direction Slider
Sets the general facing direction of plants.
Direction Random Slider
Adds randomness to plant orientation.
Weed Slider
Controls the amount of weeds mixed into the plant rows.
Alling to Landscape Checkbox
Aligns plant meshes to the landscape surface.
Forest
Strip Width Slider
Sets the width of the forest strip along the spline.
Trees Amount Slider
Controls how densely trees are spawned.
Grass Amount Slider
Controls density of grass within the forest strip.
Road
Width Slider
Controls the road’s width along the spline.
Lift Value
Elevates the road mesh upward to avoid terrain clipping.
Separator Checkbox
Enables the center separator or divider.
Sides Checkbox
Enables roadside elements such as edges or borders.
Plants Amount Slider
Controls how much vegetation spawns alongside the road.
Controls
Help Button
Opens the Documentation page.
Guides Button
Toggles between minimal and full guides visualization.
Clear Button
Removes all PCG logic and converts biome meshes into Instanced Static Mesh Components.
Spawn Button
Spawns the biome.
Remove Button
Removes the biome.
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