diff --git a/lib/body.lua b/lib/body.lua
index e569c91..97cd4b9 100644
--- a/lib/body.lua
+++ b/lib/body.lua
@@ -4,6 +4,9 @@ local height_map_conv = require(_PACKAGE..'/height_map_conv')
 
 local body = class()
 
+body.glowShader     = love.graphics.newShader(_PACKAGE.."/shaders/glow.glsl")
+body.materialShader = love.graphics.newShader(_PACKAGE.."/shaders/material.glsl")
+
 function body:init(world, id, type, ...)
 	local args = {...}
 	self.id = id
@@ -13,11 +16,6 @@ function body:init(world, id, type, ...)
 	self.glow = nil
   self.world = world
 
-  self.reflection = false
-  self.reflective = false
-  self.refraction = false
-  self.refractive = false
-
 	self.shine = true
 	self.red = 0
 	self.green = 0
@@ -600,9 +598,9 @@ function body:drawGlow()
     love.graphics.polygon("fill", unpack(self.data))
   elseif self.type == "image" and self.img then
     if self.glowStrength > 0.0 and self.glow then
-      love.graphics.setShader(self.world.glowShader)
-      self.world.glowShader:send("glowImage", self.glow)
-      self.world.glowShader:send("glowTime", love.timer.getTime() * 0.5)
+      love.graphics.setShader(self.glowShader)
+      self.glowShader:send("glowImage", self.glow)
+      self.glowShader:send("glowTime", love.timer.getTime() * 0.5)
       love.graphics.setColor(255, 255, 255)
     else
       love.graphics.setShader()
@@ -657,9 +655,11 @@ end
 
 function body:drawMaterial()
   if self.material and self.normal then
+    love.graphics.setShader(self.materialShader)
     love.graphics.setColor(255, 255, 255)
-    self.world.materialShader:send("material", self.material)
+    self.materialShader:send("material", self.material)
     love.graphics.draw(self.normal, self.x - self.nx + self.world.translate_x, self.y - self.ny + self.world.translate_y)
+    love.graphics.setShader()
   end
 end
 
diff --git a/lib/light.lua b/lib/light.lua
index 2f6bda5..485022f 100644
--- a/lib/light.lua
+++ b/lib/light.lua
@@ -5,6 +5,10 @@ local vector = require(_PACKAGE..'/vector')
 
 local light = class()
 
+light.shader             = love.graphics.newShader(_PACKAGE.."/shaders/poly_shadow.glsl")
+light.normalShader       = love.graphics.newShader(_PACKAGE.."/shaders/normal.glsl")
+light.normalInvertShader = love.graphics.newShader(_PACKAGE.."/shaders/normal_invert.glsl")
+
 function light:init(world, x, y, r, g, b, range)
   self.world = world
 	self.direction = 0
@@ -115,18 +119,18 @@ function light:setGlowStrength(strength)
 end
 
 function light:updateShadow()
+  love.graphics.setShader(self.shader)
   if self.x + self.range > self.world.translate_x and self.x - self.range < love.graphics.getWidth() + self.world.translate_x
     and self.y + self.range > self.world.translate_y and self.y - self.range < love.graphics.getHeight() + self.world.translate_y
   then
     local lightposrange = {self.x, love.graphics.getHeight() - self.y, self.range}
-    self.world.direction = self.world.direction + 0.002
-    self.world.shader:send("lightPosition", {self.x - self.world.translate_x, love.graphics.getHeight() - (self.y - self.world.translate_y), self.z})
-    self.world.shader:send("lightRange", self.range)
-    self.world.shader:send("lightColor", {self.red / 255.0, self.green / 255.0, self.blue / 255.0})
-    self.world.shader:send("lightSmooth", self.smooth)
-    self.world.shader:send("lightGlow", {1.0 - self.glowSize, self.glowStrength})
-    self.world.shader:send("lightAngle", math.pi - self.angle / 2.0)
-    self.world.shader:send("lightDirection", self.direction)
+    self.shader:send("lightPosition", {self.x - self.world.translate_x, love.graphics.getHeight() - (self.y - self.world.translate_y), self.z})
+    self.shader:send("lightRange", self.range)
+    self.shader:send("lightColor", {self.red / 255.0, self.green / 255.0, self.blue / 255.0})
+    self.shader:send("lightSmooth", self.smooth)
+    self.shader:send("lightGlow", {1.0 - self.glowSize, self.glowStrength})
+    self.shader:send("lightAngle", math.pi - self.angle / 2.0)
+    self.shader:send("lightDirection", self.direction)
 
     love.graphics.setCanvas(self.shadow)
     love.graphics.clear()
@@ -158,7 +162,7 @@ function light:updateShadow()
       self.world.body[k]:drawShadow(self)
     end
 
-    love.graphics.setShader(self.world.shader)
+    love.graphics.setShader(self.shader)
 
     -- draw shine
     love.graphics.setCanvas(self.shine)
@@ -172,6 +176,7 @@ function light:updateShadow()
   else
     self.visible = false
   end
+  love.graphics.setShader()
 end
 
 function light:drawShadow()
@@ -301,23 +306,23 @@ end
 function light:drawPixelShadow()
   if self.visible then
     if self.normalInvert then
-      self.world.normalInvertShader:send('screenResolution', {love.graphics.getWidth(), love.graphics.getHeight()})
-      self.world.normalInvertShader:send('lightColor', {self.red / 255.0, self.green / 255.0, self.blue / 255.0})
-      self.world.normalInvertShader:send('lightPosition',{self.x, love.graphics.getHeight() - self.y, self.z / 255.0})
-      self.world.normalInvertShader:send('lightRange',{self.range})
-      self.world.normalInvertShader:send("lightSmooth", self.smooth)
-      self.world.normalInvertShader:send("lightAngle", math.pi - self.angle / 2.0)
-      self.world.normalInvertShader:send("lightDirection", self.direction)
-      love.graphics.setShader(self.world.normalInvertShader)
+      self.normalInvertShader:send('screenResolution', {love.graphics.getWidth(), love.graphics.getHeight()})
+      self.normalInvertShader:send('lightColor', {self.red / 255.0, self.green / 255.0, self.blue / 255.0})
+      self.normalInvertShader:send('lightPosition',{self.x, love.graphics.getHeight() - self.y, self.z / 255.0})
+      self.normalInvertShader:send('lightRange',{self.range})
+      self.normalInvertShader:send("lightSmooth", self.smooth)
+      self.normalInvertShader:send("lightAngle", math.pi - self.angle / 2.0)
+      self.normalInvertShader:send("lightDirection", self.direction)
+      love.graphics.setShader(self.normalInvertShader)
     else
-      self.world.normalShader:send('screenResolution', {love.graphics.getWidth(), love.graphics.getHeight()})
-      self.world.normalShader:send('lightColor', {self.red / 255.0, self.green / 255.0, self.blue / 255.0})
-      self.world.normalShader:send('lightPosition',{self.x, love.graphics.getHeight() - self.y, self.z / 255.0})
-      self.world.normalShader:send('lightRange',{self.range})
-      self.world.normalShader:send("lightSmooth", self.smooth)
-      self.world.normalShader:send("lightAngle", math.pi - self.angle / 2.0)
-      self.world.normalShader:send("lightDirection", self.direction)
-      love.graphics.setShader(self.world.normalShader)
+      self.normalShader:send('screenResolution', {love.graphics.getWidth(), love.graphics.getHeight()})
+      self.normalShader:send('lightColor', {self.red / 255.0, self.green / 255.0, self.blue / 255.0})
+      self.normalShader:send('lightPosition',{self.x, love.graphics.getHeight() - self.y, self.z / 255.0})
+      self.normalShader:send('lightRange',{self.range})
+      self.normalShader:send("lightSmooth", self.smooth)
+      self.normalShader:send("lightAngle", math.pi - self.angle / 2.0)
+      self.normalShader:send("lightDirection", self.direction)
+      love.graphics.setShader(self.normalShader)
     end
     love.graphics.draw(self.world.normalMap, self.world.translate_x, self.world.translate_y)
   end
diff --git a/lib/light_world.lua b/lib/light_world.lua
index 630bd62..c9e9b66 100644
--- a/lib/light_world.lua
+++ b/lib/light_world.lua
@@ -29,82 +29,49 @@ local height_map_conv = require(_PACKAGE..'/height_map_conv')
 
 local light_world = class()
 
+light_world.blurv              = love.graphics.newShader(_PACKAGE.."/shaders/blurv.glsl")
+light_world.blurh              = love.graphics.newShader(_PACKAGE.."/shaders/blurh.glsl")
+light_world.refractionShader   = love.graphics.newShader(_PACKAGE.."/shaders/refraction.glsl")
+light_world.reflectionShader   = love.graphics.newShader(_PACKAGE.."/shaders/reflection.glsl")
+
+light_world.blurv:send("screen",            {love.window.getWidth(), love.window.getHeight()})
+light_world.blurh:send("screen",            {love.window.getWidth(), love.window.getHeight()})
+light_world.refractionShader:send("screen", {love.window.getWidth(), love.window.getHeight()})
+light_world.reflectionShader:send("screen", {love.window.getWidth(), love.window.getHeight()})
+
 function light_world:init()
   self.translate_x = 0
   self.translate_y = 0
-  self.direction = 0
-
   self.last_buffer = nil
 
 	self.lights = {}
-	self.ambient = {0, 0, 0}
 	self.body = {}
-	self.refraction = {}
-	self.shadow = love.graphics.newCanvas()
-	self.shadow2 = love.graphics.newCanvas()
-	self.shine = love.graphics.newCanvas()
-	self.shine2 = love.graphics.newCanvas()
-	self.normalMap = love.graphics.newCanvas()
-	self.glowMap = love.graphics.newCanvas()
-	self.glowMap2 = love.graphics.newCanvas()
-	self.refractionMap = love.graphics.newCanvas()
-	self.refractionMap2 = love.graphics.newCanvas()
-	self.reflectionMap = love.graphics.newCanvas()
-	self.reflectionMap2 = love.graphics.newCanvas()
-	self.normalInvert = false
-	self.glowBlur = 1.0
-	self.glowTimer = 0.0
-	self.glowDown = false
-	self.refractionStrength = 8.0
 
-	self.pixelShadow = love.graphics.newCanvas()
-	self.pixelShadow2 = love.graphics.newCanvas()
-
-  self.blurv = love.graphics.newShader("shader/blurv.glsl")
-  self.blurh = love.graphics.newShader("shader/blurh.glsl")
-  self.blurv:send("screen", {love.window.getWidth(), love.window.getHeight()})
-  self.blurh:send("screen", {love.window.getWidth(), love.window.getHeight()})
-
-	self.shader = love.graphics.newShader("shader/poly_shadow.glsl")
-	self.glowShader = love.graphics.newShader("shader/glow.glsl")
-	self.normalShader = love.graphics.newShader("shader/normal.glsl")
-	self.normalInvertShader = love.graphics.newShader("shader/normal_invert.glsl")
-	self.materialShader = love.graphics.newShader("shader/material.glsl")
-	self.refractionShader = love.graphics.newShader("shader/refraction.glsl")
-	self.refractionShader:send("screen", {love.window.getWidth(), love.window.getHeight()})
-	self.reflectionShader = love.graphics.newShader("shader/reflection.glsl")
-	self.reflectionShader:send("screen", {love.window.getWidth(), love.window.getHeight()})
-
-	self.reflectionStrength = 16.0
+	self.ambient              = {0, 0, 0}
+	self.normalInvert         = false
+	self.glowBlur             = 1.0
+	self.glowTimer            = 0.0
+	self.glowDown             = false
+	self.refractionStrength   = 8.0
+	self.reflectionStrength   = 16.0
 	self.reflectionVisibility = 1.0
-	self.blur = 2.0
-	self.optionShadows = true
-	self.optionPixelShadows = true
-	self.optionGlow = true
-	self.optionRefraction = true
-	self.optionReflection = true
-	self.isShadows = false
-	self.isLight = false
-	self.isPixelShadows = false
-	self.isGlow = false
-	self.isRefraction = false
-	self.isReflection = false
+	self.blur                 = 2.0
+
+  self:refreshScreenSize()
 end
 
 function light_world:updateShadows()
-  if not self.optionShadows or not (self.isShadows or self.isLight) then
+  if not self.isShadows and not self.isLight then
     return
   end
 
   self.last_buffer = love.graphics.getCanvas()
-  love.graphics.setShader(self.shader)
 
   for i = 1, #self.lights do
     self.lights[i]:updateShadow()
   end
 
   -- update shadow
-  love.graphics.setShader()
   love.graphics.setCanvas(self.shadow)
   love.graphics.setStencil()
   love.graphics.setColor(unpack(self.ambient))
@@ -132,7 +99,7 @@ function light_world:updateShadows()
 end
 
 function light_world:updatePixelShadows()
-  if not self.optionPixelShadows or not self.isPixelShadows then
+  if not self.isPixelShadows then
     return
   end
 
@@ -173,7 +140,7 @@ function light_world:updatePixelShadows()
 end
 
 function light_world:updateGlow()
-  if not self.optionGlow or not self.isGlow then
+  if not self.isGlow then
     return
   end
 
@@ -201,7 +168,7 @@ function light_world:updateGlow()
 end
 
 function light_world:updateRefraction()
-  if not self.optionRefraction or not self.isRefraction then
+  if not self.isRefraction then
     return
   end
 
@@ -217,7 +184,7 @@ function light_world:updateRefraction()
 end
 
 function light_world:updateRelfection()
-  if not self.optionReflection or not self.isReflection then
+  if not self.isReflection then
     return
   end
 
@@ -232,24 +199,24 @@ function light_world:updateRelfection()
 end
 
 function light_world:refreshScreenSize()
-  self.shadow = love.graphics.newCanvas()
-  self.shadow2 = love.graphics.newCanvas()
-  self.shine = love.graphics.newCanvas()
-  self.shine2 = love.graphics.newCanvas()
-  self.normalMap = love.graphics.newCanvas()
-  self.glowMap = love.graphics.newCanvas()
-  self.glowMap2 = love.graphics.newCanvas()
-  self.refractionMap = love.graphics.newCanvas()
-  self.refractionMap2 = love.graphics.newCanvas()
-  self.reflectionMap = love.graphics.newCanvas()
-  self.reflectionMap2 = love.graphics.newCanvas()
-  self.pixelShadow = love.graphics.newCanvas()
-  self.pixelShadow2 = love.graphics.newCanvas()
+	self.shadow           = love.graphics.newCanvas()
+	self.shadow2          = love.graphics.newCanvas()
+	self.pixelShadow      = love.graphics.newCanvas()
+	self.pixelShadow2     = love.graphics.newCanvas()
+	self.shine            = love.graphics.newCanvas()
+	self.shine2           = love.graphics.newCanvas()
+	self.normalMap        = love.graphics.newCanvas()
+	self.glowMap          = love.graphics.newCanvas()
+	self.glowMap2         = love.graphics.newCanvas()
+	self.refractionMap    = love.graphics.newCanvas()
+	self.refractionMap2   = love.graphics.newCanvas()
+	self.reflectionMap    = love.graphics.newCanvas()
+	self.reflectionMap2   = love.graphics.newCanvas()
 end
 
 -- draw shadow
 function light_world:drawShadow()
-  if not self.optionShadows or not (self.isShadows or self.isLight) then
+  if not self.isShadows and not self.isLight then
     return
   end
 
@@ -281,7 +248,7 @@ end
 
 -- draw shine
 function light_world:drawShine()
-  if not self.optionShadows or not self.isShadows then
+  if not self.isShadows then
     return
   end
   love.graphics.setColor(255, 255, 255)
@@ -311,7 +278,7 @@ end
 
 -- draw pixel shadow
 function light_world:drawPixelShadow()
-  if not self.optionPixelShadows or not self.isPixelShadows then
+  if not self.isPixelShadows then
     return 
   end
   self:updatePixelShadows()
@@ -324,16 +291,14 @@ end
 
 -- draw material
 function light_world:drawMaterial()
-  love.graphics.setShader(self.materialShader)
   for i = 1, #self.body do
     self.body[i]:drawMaterial()
   end
-  love.graphics.setShader()
 end
 
 -- draw glow
 function light_world:drawGlow()
-  if not self.optionGlow or not self.isGlow then
+  if not self.isGlow then
     return
   end
 
@@ -364,7 +329,7 @@ function light_world:drawGlow()
 end
 -- draw refraction
 function light_world:drawRefraction()
-  if not self.optionRefraction or not self.isRefraction then
+  if not self.isRefraction then
     return
   end
 
@@ -386,7 +351,7 @@ end
 
 -- draw reflection
 function light_world:drawReflection()
-  if not self.optionReflection or not self.isReflection then
+  if not self.isReflection then
     return
   end
 
diff --git a/lib/postshader.lua b/lib/postshader.lua
index 5e59a18..dd8b033 100644
--- a/lib/postshader.lua
+++ b/lib/postshader.lua
@@ -21,19 +21,21 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 ]]
+local _PACKAGE = (...):match("^(.+)[%./][^%./]+") or ""
+local class = require(_PACKAGE..'/class')
 
 LOVE_POSTSHADER_BUFFER_RENDER = love.graphics.newCanvas()
 LOVE_POSTSHADER_BUFFER_BACK = love.graphics.newCanvas()
 LOVE_POSTSHADER_LAST_BUFFER = nil
 
-LOVE_POSTSHADER_BLURV = love.graphics.newShader("shader/blurv.glsl")
-LOVE_POSTSHADER_BLURH = love.graphics.newShader("shader/blurh.glsl")
-LOVE_POSTSHADER_CONTRAST = love.graphics.newShader("shader/contrast.glsl")
-LOVE_POSTSHADER_CHROMATIC_ABERRATION = love.graphics.newShader("shader/chromatic_aberration.glsl")
-LOVE_POSTSHADER_FOUR_COLOR = love.graphics.newShader("shader/four_colors.glsl")
-LOVE_POSTSHADER_MONOCHROM = love.graphics.newShader("shader/monochrom.glsl")
-LOVE_POSTSHADER_SCANLINES = love.graphics.newShader("shader/scanlines.glsl")
-LOVE_POSTSHADER_TILT_SHIFT = love.graphics.newShader("shader/tilt_shift.glsl")
+LOVE_POSTSHADER_BLURV                 = love.graphics.newShader(_PACKAGE.."/shaders/blurv.glsl")
+LOVE_POSTSHADER_BLURH                 = love.graphics.newShader(_PACKAGE.."/shaders/blurh.glsl")
+LOVE_POSTSHADER_CONTRAST              = love.graphics.newShader(_PACKAGE.."/shaders/contrast.glsl")
+LOVE_POSTSHADER_CHROMATIC_ABERRATION  = love.graphics.newShader(_PACKAGE.."/shaders/chromatic_aberration.glsl")
+LOVE_POSTSHADER_FOUR_COLOR            = love.graphics.newShader(_PACKAGE.."/shaders/four_colors.glsl")
+LOVE_POSTSHADER_MONOCHROM             = love.graphics.newShader(_PACKAGE.."/shaders/monochrom.glsl")
+LOVE_POSTSHADER_SCANLINES             = love.graphics.newShader(_PACKAGE.."/shaders/scanlines.glsl")
+LOVE_POSTSHADER_TILT_SHIFT            = love.graphics.newShader(_PACKAGE.."/shaders/tilt_shift.glsl")
 
 love.postshader = {}
 
diff --git a/shader/blurh.glsl b/lib/shaders/blurh.glsl
similarity index 100%
rename from shader/blurh.glsl
rename to lib/shaders/blurh.glsl
diff --git a/shader/blurv.glsl b/lib/shaders/blurv.glsl
similarity index 100%
rename from shader/blurv.glsl
rename to lib/shaders/blurv.glsl
diff --git a/shader/chromatic_aberration.glsl b/lib/shaders/chromatic_aberration.glsl
similarity index 100%
rename from shader/chromatic_aberration.glsl
rename to lib/shaders/chromatic_aberration.glsl
diff --git a/shader/contrast.glsl b/lib/shaders/contrast.glsl
similarity index 100%
rename from shader/contrast.glsl
rename to lib/shaders/contrast.glsl
diff --git a/shader/four_colors.glsl b/lib/shaders/four_colors.glsl
similarity index 100%
rename from shader/four_colors.glsl
rename to lib/shaders/four_colors.glsl
diff --git a/shader/glow.glsl b/lib/shaders/glow.glsl
similarity index 100%
rename from shader/glow.glsl
rename to lib/shaders/glow.glsl
diff --git a/shader/material.glsl b/lib/shaders/material.glsl
similarity index 100%
rename from shader/material.glsl
rename to lib/shaders/material.glsl
diff --git a/shader/monochrom.glsl b/lib/shaders/monochrom.glsl
similarity index 100%
rename from shader/monochrom.glsl
rename to lib/shaders/monochrom.glsl
diff --git a/shader/normal.glsl b/lib/shaders/normal.glsl
similarity index 100%
rename from shader/normal.glsl
rename to lib/shaders/normal.glsl
diff --git a/shader/normal_invert.glsl b/lib/shaders/normal_invert.glsl
similarity index 100%
rename from shader/normal_invert.glsl
rename to lib/shaders/normal_invert.glsl
diff --git a/shader/poly_shadow.glsl b/lib/shaders/poly_shadow.glsl
similarity index 100%
rename from shader/poly_shadow.glsl
rename to lib/shaders/poly_shadow.glsl
diff --git a/shader/reflection.glsl b/lib/shaders/reflection.glsl
similarity index 100%
rename from shader/reflection.glsl
rename to lib/shaders/reflection.glsl
diff --git a/shader/refraction.glsl b/lib/shaders/refraction.glsl
similarity index 100%
rename from shader/refraction.glsl
rename to lib/shaders/refraction.glsl
diff --git a/shader/scanlines.glsl b/lib/shaders/scanlines.glsl
similarity index 100%
rename from shader/scanlines.glsl
rename to lib/shaders/scanlines.glsl
diff --git a/shader/tilt_shift.glsl b/lib/shaders/tilt_shift.glsl
similarity index 100%
rename from shader/tilt_shift.glsl
rename to lib/shaders/tilt_shift.glsl