diff --git a/src/server/terrain/biomes.zig b/src/server/terrain/biomes.zig
index 96dbdd58..9f50876f 100644
--- a/src/server/terrain/biomes.zig
+++ b/src/server/terrain/biomes.zig
@@ -326,6 +326,7 @@ pub const Biome = struct { // MARK: Biome
 					.chance = src.get(f32, "chance", 1),
 					.propertyMask = GenerationProperties.fromZon(src.getChild("properties"), false),
 					.width = src.get(u8, "width", 2),
+					.keepOriginalTerrain = src.get(f32, "keepOriginalTerrain", 0),
 				};
 				// Fill all unspecified property groups:
 				var properties: u12 = @bitCast(dst.propertyMask);
@@ -587,12 +588,14 @@ const UnfinishedTransitionBiomeData = struct {
 	chance: f32,
 	propertyMask: Biome.GenerationProperties,
 	width: u8,
+	keepOriginalTerrain: f32,
 };
 const TransitionBiome = struct {
 	biome: *const Biome,
 	chance: f32,
 	propertyMask: Biome.GenerationProperties,
 	width: u8,
+	keepOriginalTerrain: f32,
 };
 var unfinishedTransitionBiomes: std.StringHashMapUnmanaged([]UnfinishedTransitionBiomeData) = .{};
 
@@ -695,12 +698,14 @@ pub fn finishLoading() void {
 						.chance = 0,
 						.propertyMask = .{},
 						.width = 0,
+						.keepOriginalTerrain = 0,
 					};
 					continue;
 				},
 				.chance = src.chance,
 				.propertyMask = src.propertyMask,
 				.width = src.width,
+				.keepOriginalTerrain = src.keepOriginalTerrain,
 			};
 		}
 		main.globalAllocator.free(transitionBiomes);
diff --git a/src/server/terrain/climategen/NoiseBasedVoronoi.zig b/src/server/terrain/climategen/NoiseBasedVoronoi.zig
index 0105e950..a6aba38c 100644
--- a/src/server/terrain/climategen/NoiseBasedVoronoi.zig
+++ b/src/server/terrain/climategen/NoiseBasedVoronoi.zig
@@ -358,12 +358,13 @@ const GenerationStructure = struct {
 					result = (result | result >> 1 | result >> 2);
 					if(result & mask == mask) {
 						if(random.nextFloat(&seed) < transitionBiome.chance) {
+							const newHeight = @as(f32, @floatFromInt(transitionBiome.biome.minHeight)) + @as(f32, @floatFromInt(transitionBiome.biome.maxHeight - transitionBiome.biome.minHeight))*random.nextFloat(&seed);
 							map[x][y] = .{
 								.biome = transitionBiome.biome,
-								.roughness = transitionBiome.biome.roughness,
-								.hills = transitionBiome.biome.hills,
-								.mountains = transitionBiome.biome.mountains,
-								.height = @as(f32, @floatFromInt(transitionBiome.biome.minHeight)) + @as(f32, @floatFromInt(transitionBiome.biome.maxHeight - transitionBiome.biome.minHeight))*random.nextFloat(&seed),
+								.roughness = std.math.lerp(transitionBiome.biome.roughness, map[x][y].roughness, transitionBiome.keepOriginalTerrain),
+								.hills = std.math.lerp(transitionBiome.biome.hills, map[x][y].hills, transitionBiome.keepOriginalTerrain),
+								.mountains = std.math.lerp(transitionBiome.biome.mountains, map[x][y].mountains, transitionBiome.keepOriginalTerrain),
+								.height = std.math.lerp(newHeight, map[x][y].height, transitionBiome.keepOriginalTerrain),
 								.seed = map[x][y].seed,
 							};
 							break;