diff --git a/doc/lua_api.txt b/doc/lua_api.txt
index f0e6931db..8e750c5a4 100644
--- a/doc/lua_api.txt
+++ b/doc/lua_api.txt
@@ -809,6 +809,11 @@ node definition:
       0 = y+    1 = z+    2 = z-    3 = x+    4 = x-    5 = y-
       facedir modulo 4 = rotation around that axis
     paramtype2 == "leveled"
+    ^ Only valid for "nodebox" with type = "leveled".
+        The level of the top face of the nodebox is stored in param2.
+        The other faces are defined by 'fixed = {}' like 'type = "fixed"' nodeboxes.
+        The nodebox height is param2 / 64 nodes.
+        The maximum accepted value of param2 is 127.
     paramtype2 == "degrotate"
     ^ The rotation of this node is stored in param2. Plants are rotated this way.
       Values range 0 - 179. The value stored in param2 is multiplied by two to
diff --git a/src/mapnode.cpp b/src/mapnode.cpp
index d835daba2..ff5ad5557 100644
--- a/src/mapnode.cpp
+++ b/src/mapnode.cpp
@@ -249,18 +249,11 @@ void transformNodeBox(const MapNode &n, const NodeBox &nodebox,
 		int facedir = n.getFaceDir(nodemgr);
 		u8 axisdir = facedir>>2;
 		facedir&=0x03;
-		for(std::vector<aabb3f>::const_iterator
-				i = fixed.begin();
-				i != fixed.end(); ++i)
-		{
-			aabb3f box = *i;
+		for (aabb3f box : fixed) {
+			if (nodebox.type == NODEBOX_LEVELED)
+				box.MaxEdge.Y = (-0.5f + n.getLevel(nodemgr) / 64.0f) * BS;
 
-			if (nodebox.type == NODEBOX_LEVELED) {
-				box.MaxEdge.Y = -BS/2 + BS*((float)1/LEVELED_MAX) * n.getLevel(nodemgr);
-			}
-
-			switch (axisdir)
-			{
+			switch (axisdir) {
 			case 0:
 				if(facedir == 1)
 				{
diff --git a/src/mapnode.h b/src/mapnode.h
index 9c56a7e17..23248c45d 100644
--- a/src/mapnode.h
+++ b/src/mapnode.h
@@ -103,8 +103,8 @@ enum Rotation {
 
 #define LIQUID_INFINITY_MASK 0x80 //0b10000000
 
-// mask for param2, now as for liquid
-#define LEVELED_MASK 0x3F
+// mask for leveled nodebox param2
+#define LEVELED_MASK 0x7F
 #define LEVELED_MAX LEVELED_MASK