Overview
The region equivalent of blend, combining two RegionMaps into one. It builds complex
compositions by layering different region structures, such as ore speckles over a base
of geological strata.
- type_id:
region_compose - category:
Generate/Region/Edit
It composites two RegionMap values on the same canvas. Use it to place ore or grime
scatter over a stratum base, or replace only a masked range with other regions.
Usage tips
- The standard setup is
image_to_regions(ๅฐๅฑค)+region_scatter(ๆ็น)โ this node, a central pattern in the introductory region-system workflow. - Parameters decide how IDs are assigned after compositing, including overwrite and
offset behavior. Build the habit of checking the result with
region_debug_preview. - Chain this node to combine three or more layers.
Main parameters
| ID | Description |
|---|---|
mode |
Compositing method, such as overwrite, fill only outside, or replace within a mask |
id_mode |
Avoid, preserve, or repack ID collisions from the overlay |
seed |
Seed for preview colors |
show_ids |
Show ID labels in the inspector preview |
When mask is connected, its arbitrary shape takes priority and output wrap_x /
wrap_y are disabled.
ID่ฉฐใ็ดใ first offsets overlay IDs to avoid collisions, then renumbers the composite
from 0. ้ใญใIDใ็ถญๆ preserves ID collisions. If the base and overlay use the same
ID, preview colors and later ID-based processing see them as one region.
Usage
Build a large base with Region Strata or Region Cells, create small ore or grime
regions with Region Scatter, then combine them here. To target overlay regions by ID
downstream, first use ้ใชใIDใใใใ or ID่ฉฐใ็ดใ, then inspect IDs with
Region Debug Preview as needed.
preview and labels are for inspection. Connect regions to downstream region operations.
Related nodes
region_scatter/region_strata/region_cellsโ supply regions to compositeregion_remapโ organize IDs after compositingregion_debug_previewโ inspect the ID structureregion_fill/region_pattern_assignโ fill the composite result