diff --git a/src/play_clj/core_2d.clj b/src/play_clj/core_2d.clj
index 1e784dd..d330f04 100644
--- a/src/play_clj/core_2d.clj
+++ b/src/play_clj/core_2d.clj
@@ -16,10 +16,12 @@
 
 (defn draw-actor!
   [^SpriteBatch batch {:keys [^Actor object] :as entity}]
+  (assert object)
   (.draw ^Actor object batch 1))
 
 (defn draw-image!
   [^SpriteBatch batch {:keys [^TextureRegion object x y width height]}]
+  (assert (and object x y width height))
   (.draw batch object (float x) (float y) (float width) (float height)))
 
 (defn draw-entity!
diff --git a/src/play_clj/core_interop.clj b/src/play_clj/core_interop.clj
index 25f8d1f..2f4c2ef 100644
--- a/src/play_clj/core_interop.clj
+++ b/src/play_clj/core_interop.clj
@@ -8,9 +8,21 @@
 
 ; render
 
-(defmacro tiled-map-renderer!
+(defmacro orthogonal-tiled-map!
   [{:keys [renderer]} k & options]
-  `(utils/call! ^BatchTiledMapRenderer ~renderer ~k ~@options))
+  `(utils/call! ^OrthogonalTiledMapRenderer ~renderer ~k ~@options))
+
+(defmacro isometric-tiled-map!
+  [{:keys [renderer]} k & options]
+  `(utils/call! ^IsometricTiledMapRenderer ~renderer ~k ~@options))
+
+(defmacro isometric-staggered-tiled-map!
+  [{:keys [renderer]} k & options]
+  `(utils/call! ^IsometricStaggeredTiledMapRenderer ~renderer ~k ~@options))
+
+(defmacro hexagonal-tiled-map!
+  [{:keys [renderer]} k & options]
+  `(utils/call! ^HexagonalTiledMapRenderer ~renderer ~k ~@options))
 
 (defmacro stage!
   [{:keys [renderer]} k & options]
diff --git a/src/play_clj/core_render.clj b/src/play_clj/core_render.clj
index ca9dbfc..a777f4f 100644
--- a/src/play_clj/core_render.clj
+++ b/src/play_clj/core_render.clj
@@ -48,20 +48,22 @@
     (.load (TmxMapLoader.) s)
     s))
 
-(defn tiled-map-renderer
-  [renderer-type path pixels-per-tile]
-  (let [^TiledMap tmap (tiled-map path)
-        ^double unit-scale (/ 1 pixels-per-tile)]
-    (case renderer-type
-      :orthogonal
-      (OrthogonalTiledMapRenderer. tmap unit-scale)
-      :isometric
-      (IsometricTiledMapRenderer. tmap unit-scale)
-      :isometric-staggered
-      (IsometricStaggeredTiledMapRenderer. tmap unit-scale)
-      :hexagonal
-      (IsometricTiledMapRenderer. tmap unit-scale)
-      nil)))
+(defn orthogonal-tiled-map
+  [path ppt]
+  (OrthogonalTiledMapRenderer. ^TiledMap (tiled-map path) ^double (/ 1 ppt)))
+
+(defn isometric-tiled-map
+  [path ppt]
+  (IsometricTiledMapRenderer. ^TiledMap (tiled-map path) ^double (/ 1 ppt)))
+
+(defn isometric-staggered-tiled-map
+  [path ppt]
+  (IsometricStaggeredTiledMapRenderer. ^TiledMap (tiled-map path)
+                                       ^double (/ 1 ppt)))
+
+(defn hexagonal-tiled-map
+  [path ppt]
+  (HexagonalTiledMapRenderer. ^TiledMap (tiled-map path) ^double (/ 1 ppt)))
 
 (defn stage
   []