diff --git a/lib/light_world.lua b/lib/light_world.lua
index 57e088c..956fa7b 100644
--- a/lib/light_world.lua
+++ b/lib/light_world.lua
@@ -249,7 +249,7 @@ function light_world:draw(l,t,w,h,s)
 
   love.graphics.push()
     love.graphics.scale(1/s)
-    sl, st, sw, sh = (l*s), (t*s), (w*s), (h*s)
+    local sl, st, sw, sh = (l*s), (t*s), (w*s), (h*s)
     self.drawBackground(  sl,st,sw,sh,s)
     self:drawShadow(      sl,st,sw,sh,s)
     self.drawForground(   sl,st,sw,sh,s)
@@ -260,7 +260,7 @@ function light_world:draw(l,t,w,h,s)
     self:drawReflection(  sl,st,sw,sh,s)
   love.graphics.pop()
  
-  self.post_shader:drawWith(self.render_buffer)
+  self.post_shader:drawWith(self.render_buffer, l, t)
 end
 
 -- draw shadow
diff --git a/lib/postshader.lua b/lib/postshader.lua
index d135962..0d28133 100644
--- a/lib/postshader.lua
+++ b/lib/postshader.lua
@@ -64,7 +64,7 @@ function post_shader:toggleEffect(shaderName, ...)
   end
 end
 
-function post_shader:drawWith(canvas)
+function post_shader:drawWith(canvas, l, t)
   for shader, args in pairs(self.effects) do 
     if shader == "bloom" then
       self:drawBloom(canvas, args)
@@ -88,7 +88,7 @@ function post_shader:drawWith(canvas)
   love.graphics.setCanvas()
   love.graphics.setShader()
   love.graphics.setColor(255, 255, 255)
-  love.graphics.draw(canvas)
+  love.graphics.draw(canvas, l or 0, t or 0)
 end
 
 function post_shader:drawBloom(canvas, args)