diff --git a/coords/mapblockcoords.go b/coords/mapblockcoords.go
index c1ae682..ac24fd6 100644
--- a/coords/mapblockcoords.go
+++ b/coords/mapblockcoords.go
@@ -9,7 +9,7 @@ func NewMapBlockCoords(x, y, z int) MapBlockCoords {
 }
 
 type MapBlockRange struct {
-	pos1, pos2 MapBlockCoords
+	Pos1, Pos2 MapBlockCoords
 }
 
 const (
diff --git a/coords/tileconvert.go b/coords/tileconvert.go
index 48c63a3..f5b25bc 100644
--- a/coords/tileconvert.go
+++ b/coords/tileconvert.go
@@ -1,5 +1,9 @@
 package coords
 
+import (
+	"math"
+)
+
 const (
 	MAX_ZOOM = 13
 )
@@ -7,3 +11,19 @@ const (
 func GetTileCoordsFromMapBlock(mbc MapBlockCoords) TileCoords {
 	return TileCoords{X: mbc.X, Y: (mbc.Z + 1) * -1, Zoom: MAX_ZOOM}
 }
+
+func GetMapBlockRangeFromTile(tc TileCoords, y int) MapBlockRange {
+	scaleDiff := float64(MAX_ZOOM - tc.Zoom)
+	scale := int(math.Pow(2, scaleDiff))
+
+	mapBlockX1 := tc.X * scale
+	mapBlockZ1 := (tc.Y * scale * -1) - 1
+
+	mapBlockX2 := mapBlockX1 + scale-1
+	mapBlockZ2 := (mapBlockZ1 + ((scale-1) * -1))
+
+	return MapBlockRange{
+		Pos1: NewMapBlockCoords(mapBlockX1, y, mapBlockZ1),
+		Pos2: NewMapBlockCoords(mapBlockX2, y, mapBlockZ2),
+	}
+}
diff --git a/main.go b/main.go
index 2f0d89b..1566450 100644
--- a/main.go
+++ b/main.go
@@ -72,6 +72,6 @@ func main() {
 		panic(err)
 	}
 
-	initialrenderer.Render(&r, tdb)
+	initialrenderer.Render(r, tdb)
 
 }
diff --git a/mapblockrenderer/renderer.go b/mapblockrenderer/renderer.go
index 7aa9dac..6b4e83b 100644
--- a/mapblockrenderer/renderer.go
+++ b/mapblockrenderer/renderer.go
@@ -16,8 +16,8 @@ type MapBlockRenderer struct {
 	colors   *colormapping.ColorMapping
 }
 
-func NewMapBlockRenderer(accessor *mapblockaccessor.MapBlockAccessor, colors *colormapping.ColorMapping) MapBlockRenderer {
-	return MapBlockRenderer{accessor: accessor, colors: colors}
+func NewMapBlockRenderer(accessor *mapblockaccessor.MapBlockAccessor, colors *colormapping.ColorMapping) *MapBlockRenderer {
+	return &MapBlockRenderer{accessor: accessor, colors: colors}
 }
 
 const (
diff --git a/mapblockrenderer/renderer_test.go b/mapblockrenderer/renderer_test.go
index 13c8f72..c9c2b2e 100644
--- a/mapblockrenderer/renderer_test.go
+++ b/mapblockrenderer/renderer_test.go
@@ -46,9 +46,9 @@ func TestSimpleRender(t *testing.T) {
 	results := make(chan JobResult, 100)
 	jobs := make(chan JobData, 100)
 
-	go Worker(&r, jobs, results)
-	go Worker(&r, jobs, results)
-	go Worker(&r, jobs, results)
+	go Worker(r, jobs, results)
+	go Worker(r, jobs, results)
+	go Worker(r, jobs, results)
 
 	go func() {
 		for result := range results {
diff --git a/tilerenderer/renderer.go b/tilerenderer/renderer.go
index ba32d9d..e28fcba 100644
--- a/tilerenderer/renderer.go
+++ b/tilerenderer/renderer.go
@@ -18,5 +18,12 @@ func NewTileRenderer(mapblockrenderer *mapblockrenderer.MapBlockRenderer) *TileR
 
 //TODO layerConfig
 func (tr *TileRenderer) Render(tc coords.TileCoords) (*image.NRGBA, error) {
+	if tc.Zoom == 13 {
+		//max zoomed in on mapblock level
+		//mbr := coords.GetMapBlockRangeFromTile(tc, 0)
+		//return tr.mapblockrenderer.Render()
+
+	}
+
 	return nil, nil
 }
diff --git a/tilerenderer/renderer_test.go b/tilerenderer/renderer_test.go
new file mode 100644
index 0000000..e704cae
--- /dev/null
+++ b/tilerenderer/renderer_test.go
@@ -0,0 +1,62 @@
+package tilerenderer
+
+import (
+	"github.com/sirupsen/logrus"
+	"io/ioutil"
+	"mapserver/colormapping"
+	"mapserver/db"
+	"mapserver/mapblockaccessor"
+  "mapserver/testutils"
+  "mapserver/mapblockrenderer"
+  "mapserver/coords"
+	"os"
+	"testing"
+)
+
+func TestTileRender(t *testing.T) {
+	logrus.SetLevel(logrus.InfoLevel)
+
+	tmpfile, err := ioutil.TempFile("", "TestTileRender.*.sqlite")
+	if err != nil {
+		panic(err)
+	}
+	defer os.Remove(tmpfile.Name())
+	testutils.CreateTestDatabase(tmpfile.Name())
+
+	a, err := db.NewSqliteAccessor(tmpfile.Name())
+	if err != nil {
+		panic(err)
+	}
+
+	err = a.Migrate()
+	if err != nil {
+		panic(err)
+	}
+
+	cache := mapblockaccessor.NewMapBlockAccessor(a)
+	c := colormapping.NewColorMapping()
+	err = c.LoadVFSColors(false, "/colors.txt")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	r := mapblockrenderer.NewMapBlockRenderer(cache, c)
+
+  tr := NewTileRenderer(r)
+
+  if tr == nil {
+    panic("no renderer")
+  }
+
+  coord := coords.NewTileCoords(0,0,12,0)
+
+  data, err := tr.Render(coord)
+
+  if err != nil {
+    panic(err)
+  }
+
+  if data == nil {
+    panic("no data")
+  }
+}