diff --git a/overviewer_core/src/iterate.c b/overviewer_core/src/iterate.c
index 4c30fa8..b3251e9 100644
--- a/overviewer_core/src/iterate.c
+++ b/overviewer_core/src/iterate.c
@@ -178,7 +178,7 @@ bool load_chunk(RenderState* state, int32_t x, int32_t z, uint8_t required) {
         if (!ycoord)
             continue;
 
-        sectiony = PyLong_AsLong(ycoord);
+        sectiony = PyLong_AsLong(ycoord) + 4;
         if (sectiony >= 0 && sectiony < SECTIONS_PER_CHUNK)
             load_chunk_section(dest, sectiony, section);
     }
@@ -353,7 +353,7 @@ generate_pseudo_data(RenderState* state, uint16_t ancilData) {
         /* calculate the global block coordinates of this position */
         wx = (state->chunkx * 16) + x;
         wz = (state->chunkz * 16) + z;
-        wy = (state->chunky * 16) + y;
+        wy = ((state->chunky - 4) * 16) + y;
         /* lilypads orientation is obtained with these magic numbers */
         /* magic numbers obtained from: */
         /* http://llbit.se/?p=1537 */
diff --git a/overviewer_core/src/overviewer.h b/overviewer_core/src/overviewer.h
index e70da85..fe35644 100644
--- a/overviewer_core/src/overviewer.h
+++ b/overviewer_core/src/overviewer.h
@@ -31,7 +31,7 @@
 
 // increment this value if you've made a change to the c extension
 // and want to force users to rebuild
-#define OVERVIEWER_EXTENSION_VERSION 107
+#define OVERVIEWER_EXTENSION_VERSION 108
 
 #include <stdbool.h>
 #include <stdint.h>
@@ -78,7 +78,7 @@ PyObject* resize_half_wrap(PyObject* self, PyObject* args);
 typedef struct _RenderMode RenderMode;
 
 /* in iterate.c */
-#define SECTIONS_PER_CHUNK 16
+#define SECTIONS_PER_CHUNK 24
 typedef struct {
     /* whether this chunk is loaded: use load_chunk to load */
     int32_t loaded;
diff --git a/overviewer_core/tileset.py b/overviewer_core/tileset.py
index 4f2def6..829886d 100644
--- a/overviewer_core/tileset.py
+++ b/overviewer_core/tileset.py
@@ -1081,7 +1081,7 @@ class TileSet(object):
         max_chunk_mtime = 0
         for col, row, chunkx, chunky, chunkz, chunk_mtime in chunks:
             xpos = -192 + (col - colstart) * 192
-            ypos = -96 + (row - rowstart) * 96 + (16 - 1 - chunky) * 192
+            ypos = -96 + (row - rowstart) * 96 + (24 - 1 - chunky) * 192
 
             if chunk_mtime > max_chunk_mtime:
                 max_chunk_mtime = chunk_mtime
@@ -1324,12 +1324,12 @@ def get_tiles_by_chunk(chunkcol, chunkrow):
         colrange = (tilecol,)
 
     # If this chunk is in a row divisible by 4, then it touches the
-    # tile above it as well. Also touches the next 4 tiles down (16
+    # tile above it as well. Also touches the next 6 tiles down (24
     # rows)
     if chunkrow % 4 == 0:
-        rowrange = range(tilerow - 4, tilerow + 32 + 1, 4)
+        rowrange = range(tilerow - 4, tilerow + 48 + 1, 4)
     else:
-        rowrange = range(tilerow, tilerow + 32 + 1, 4)
+        rowrange = range(tilerow, tilerow + 48 + 1, 4)
 
     return product(colrange, rowrange)
 
@@ -1360,12 +1360,12 @@ def get_chunks_by_tile(tile, regionset):
     # First do the odd. For each chunk in the tile's odd column the tile
     # "passes through" three chunk sections.
     oddcol_sections = []
-    for i, y in enumerate(reversed(range(16))):
+    for i, y in enumerate(reversed(range(24))):
         for row in range(tile.row + 3 - i * 2, tile.row - 2 - i * 2, -2):
             oddcol_sections.append((tile.col + 1, row, y))
 
     evencol_sections = []
-    for i, y in enumerate(reversed(range(16))):
+    for i, y in enumerate(reversed(range(24))):
         for row in range(tile.row + 4 - i * 2, tile.row - 3 - i * 2, -2):
             evencol_sections.append((tile.col + 2, row, y))
             evencol_sections.append((tile.col, row, y))
diff --git a/overviewer_core/world.py b/overviewer_core/world.py
index 8cb6213..cdae1ba 100644
--- a/overviewer_core/world.py
+++ b/overviewer_core/world.py
@@ -200,8 +200,8 @@ class World(object):
         ## clamp spawnY to a sane value, in-chunk value
         if spawnY < 0:
             spawnY = 0
-        if spawnY > 255:
-            spawnY = 255
+        if spawnY > 319:
+            spawnY = 319
             
         ## The chunk that holds the spawn location
         chunkX = spawnX//16
@@ -236,7 +236,7 @@ class World(object):
                 spawnY += 1
             # Next section, start at local 0
             inChunkY = 0
-        return spawnX, 256, spawnZ
+        return spawnX, 320, spawnZ
 
 class RegionSet(object):
     """This object is the gateway to a particular Minecraft dimension within a