diff --git a/src/Render.hs b/src/Render.hs
index fd12699e9..9d2210232 100644
--- a/src/Render.hs
+++ b/src/Render.hs
@@ -1,6 +1,5 @@
 module Render (
     createLightMap,
-    divideSize,
     renderFoldable,
     renderLayer,
     pingPongBetween,
@@ -20,15 +19,11 @@ import Dodge.Data.Config
 import Foreign hiding (rotate)
 import Geometry.Data
 import Graphics.GL.Core43
-import Graphics.Rendering.OpenGL hiding (Color, Line, Polygon, T, imageHeight, scale, translate)
 import Picture.Data
 import Shader
 import Shader.Data
 import Shader.ExtraPrimitive
 
-divideSize :: Int -> Size -> Size
-divideSize i (Size x y) = Size (div x $ fromIntegral i) (div y $ fromIntegral i)
-
 -- | Determine where light is shining in the world.
 -- think of the produced texture as showing what RGB values should be "taken
 -- away" from the shape colors.
@@ -55,26 +50,30 @@ createLightMap pdata lightPoints nWalls nSils nCaps drawObjShads toPos drawCPUSh
         ltextShad = _lightingTextureShader pdata
     -- we assume that the renderbuffer's depth has been correctly set elsewhere
     -- we will not be changing that here
-    depthMask $= Disabled
+    glDepthMask GL_FALSE
     -- clearColor is specified differently in preloadRender
     -- the colors are inverted
-    clearColor $= Color4 1 1 1 1
-    clear [ColorBuffer]
+    glClearColor 1 1 1 1
+    glClear GL_COLOR_BUFFER_BIT
     -- for each of the lights:
     -- 1. stencil out the shadows from this light's point of view
     -- 2. calculate lighting based on each fragment's position
     -- to consider: adding normals/a "material" for each fragment
-    blendFunc $= (Zero, OneMinusSrcColor)
-    stencilTest $= Enabled
-    stencilOpSeparate Front $= (OpKeep, OpKeep, OpIncrWrap)
-    stencilOpSeparate Back $= (OpKeep, OpKeep, OpDecrWrap)
+    glBlendFunc GL_ZERO GL_ONE_MINUS_SRC_COLOR
+    glEnable GL_STENCIL_TEST
+    --stencilTest $= Enabled
+    glStencilOpSeparate GL_FRONT GL_KEEP GL_KEEP GL_INCR_WRAP
+    --stencilOpSeparate Front $= (OpKeep, OpKeep, OpIncrWrap)
+    --stencilOpSeparate Back $= (OpKeep, OpKeep, OpDecrWrap)
+    glStencilOpSeparate GL_BACK GL_KEEP GL_KEEP GL_DECR_WRAP
     flip VFSM.mapM_ (VFSM.fromList lightPoints) $ \(V3 x y z, rad, V3 r g b) -> do
-        depthFunc $= Just Less
+        glDepthFunc GL_LESS
         -- setup stencil
-        colorMask $= Color4 Disabled Disabled Disabled Disabled
-        clear [StencilBuffer]
-        cullFace $= Nothing
-        stencilFunc $= (Always, 0, 255)
+        glColorMask GL_FALSE GL_FALSE GL_FALSE GL_FALSE 
+        glClear GL_STENCIL_BUFFER_BIT
+        glDisable GL_CULL_FACE
+        --cullFace $= Nothing
+        glStencilFunc GL_ALWAYS 0 255
         --draw wall shadows
         --currentProgram $= Just (_shadProg lwallShad)
         glUseProgram (_shadProg' lwallShad)
@@ -104,7 +103,9 @@ createLightMap pdata lightPoints nWalls nSils nCaps drawObjShads toPos drawCPUSh
                     GL_UNSIGNED_SHORT
                     nullPtr
                 --draw caps on the near plane as required
-                cullFace $= Just Back
+                glEnable GL_CULL_FACE
+                glCullFace GL_BACK
+                --cullFace $= Just Back
                 --currentProgram $= Just (_shadProg lcapShad)
                 --uniform (_shadUnis lcapShad V.! 0) $= Vector3 x y z
                 glUseProgram (_shadProg' lcapShad)
@@ -119,12 +120,14 @@ createLightMap pdata lightPoints nWalls nSils nCaps drawObjShads toPos drawCPUSh
             CPUObjShads -> drawCPUShadows (V3 x y z) rad
             _ -> return ()
         --draw lightmap itself
-        depthFunc $= Just Always
+        glEnable GL_DEPTH_TEST
+        glDepthFunc GL_ALWAYS
+        --depthFunc $= Just Always
         -- bind world position texture
         bindTO toPos
-        colorMask $= Color4 Enabled Enabled Enabled Enabled
+        glColorMask GL_TRUE GL_TRUE GL_TRUE GL_TRUE
         --stencilOp $= (OpKeep, OpKeep, OpKeep)
-        stencilFunc $= (Equal, 0, 255)
+        glStencilFunc GL_EQUAL 0 255
         --currentProgram $= ltextShad ^? shadProg --Just (_shadProg ltextShad)
         --uniform (_shadUnis ltextShad V.! 0) $= Vector3 x y z
         --uniform (_shadUnis ltextShad V.! 1) $= Vector4 r g b rad
@@ -138,8 +141,8 @@ createLightMap pdata lightPoints nWalls nSils nCaps drawObjShads toPos drawCPUSh
             0
             (fromIntegral (4 :: Int))
     --cleanup: may not be necessary, depending on what comes after...
-    cullFace $= Nothing
-    stencilTest $= Disabled
+    glDisable GL_CULL_FACE
+    glDisable GL_STENCIL_TEST
 
 -- assumes that vertices have already been sent to the shader
 pingPongBetween ::