From 274766555858d30ca6153647c005ce8ad35416ab Mon Sep 17 00:00:00 2001
From: Victor Giers <mail@victorgiers.com>
Date: Sat, 2 May 2026 04:09:09 +0200
Subject: [PATCH] Add foliage mask support to terrain structure

---
 src/document/terrains.ts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/document/terrains.ts b/src/document/terrains.ts
index a905a684..14fdc2c6 100644
--- a/src/document/terrains.ts
+++ b/src/document/terrains.ts
@@ -5,6 +5,15 @@ export interface TerrainLayer {
   materialId: string | null;
 }
 
+export interface TerrainFoliageMask {
+  layerId: string;
+  resolutionX: number;
+  resolutionZ: number;
+  values: number[];
+}
+
+export type TerrainFoliageMaskRegistry = Record<string, TerrainFoliageMask>;
+
 export interface Terrain {
   id: string;
   kind: "terrain";
@@ -19,6 +28,7 @@ export interface Terrain {
   heights: number[];
   layers: TerrainLayer[];
   paintWeights: number[];
+  foliageMasks: TerrainFoliageMaskRegistry;
 }
 
 export interface TerrainHeightPatchEntry {