diff --git a/world/default/voxel_chunk_default.cpp b/world/default/voxel_chunk_default.cpp
index 767f3d5..2454803 100644
--- a/world/default/voxel_chunk_default.cpp
+++ b/world/default/voxel_chunk_default.cpp
@@ -2219,6 +2219,8 @@ void VoxelChunkDefault::_bind_methods() {
 
 	BIND_ENUM_CONSTANT(DEFAULT_CHANNEL_TYPE);
 	BIND_ENUM_CONSTANT(DEFAULT_CHANNEL_ISOLEVEL);
+	BIND_ENUM_CONSTANT(DEFAULT_CHANNEL_ALT_TYPE);
+	BIND_ENUM_CONSTANT(DEFAULT_CHANNEL_ALT_ISOLEVEL);
 	BIND_ENUM_CONSTANT(DEFAULT_CHANNEL_LIGHT_COLOR_R);
 	BIND_ENUM_CONSTANT(DEFAULT_CHANNEL_LIGHT_COLOR_G);
 	BIND_ENUM_CONSTANT(DEFAULT_CHANNEL_LIGHT_COLOR_B);
diff --git a/world/default/voxel_chunk_default.h b/world/default/voxel_chunk_default.h
index e8413a8..fc0a9a2 100644
--- a/world/default/voxel_chunk_default.h
+++ b/world/default/voxel_chunk_default.h
@@ -83,6 +83,8 @@ public:
 	enum DefaultChannels {
 		DEFAULT_CHANNEL_TYPE = 0,
 		DEFAULT_CHANNEL_ISOLEVEL,
+		DEFAULT_CHANNEL_ALT_TYPE,
+		DEFAULT_CHANNEL_ALT_ISOLEVEL,
 		DEFAULT_CHANNEL_LIGHT_COLOR_R,
 		DEFAULT_CHANNEL_LIGHT_COLOR_G,
 		DEFAULT_CHANNEL_LIGHT_COLOR_B,