diff --git a/shader/texture/antia.frag b/shader/texture/antia.frag
index e477069d9..81fdbe791 100644
--- a/shader/texture/antia.frag
+++ b/shader/texture/antia.frag
@@ -3,19 +3,35 @@ in vec2 vTexPos;
 out vec4 fColor;
 layout (location = 0) uniform vec2 screensize;
 layout(binding = 0) uniform sampler2D screenTexture;
-float xoff = 2 / screensize.x;
-float yoff = 2 / screensize.y;
 vec3 f (float x, float y)
-{ return texture(screenTexture, vTexPos + vec2(x*xoff,y*yoff)).xyz; 
+//{ return texture(screenTexture, vTexPos + vec2((x+0.5)/screensize.x,(y+0.5)/screensize.y)).xyz; 
+{ return texture(screenTexture, vTexPos + vec2(x/screensize.x,y/screensize.y)).xyz; 
+}
+bool t (vec3 x, vec3 y)
+{ return dot(x-y,x-y) < 0.1;
+}
+bool t3 (vec3 x, vec3 y, vec3 z)
+{ return t(x,y) && t(y,z);
 }
 void main() 
 {
 vec3 tl = f(-1, 1);
-vec3 tt = f( 0, 1);
+vec3 tt = f( 0, 2);
 vec3 tr = f( 1, 1);
-vec3 mr = f( 1, 0);
+vec3 mr = f( 2, 0);
 vec3 br = f( 1,-1);
-    if (tl == tt && tt == tr && tr == mr && mr == br)
+vec3 bb = f( 0,-2);
+vec3 bl = f(-1,-1);
+vec3 ml = f(-2, 0);
+    if (t3(tt,tr,mr))
+        { fColor = vec4(tr,1);}
+    else if (t3(mr,br,bb))
+        { fColor = vec4(br,1);}
+    else if (t3(bb,bl,ml))
+        { fColor = vec4(bl,1);}
+    else if (t3(ml,tl,tt))
         { fColor = vec4(tl,1);}
-    else {fColor = texture(screenTexture, vTexPos); }
+    else 
+        //{fColor = texture(screenTexture, vTexPos); }
+        {fColor = vec4(f(0,0),1); }
 }
diff --git a/src/Dodge/Data/Config.hs b/src/Dodge/Data/Config.hs
index 2ff6e0577..b4a92c7f3 100644
--- a/src/Dodge/Data/Config.hs
+++ b/src/Dodge/Data/Config.hs
@@ -49,6 +49,7 @@ data Config = Config
     { _volume_master :: Float
     , _volume_sound :: Float
     , _volume_music :: Float
+    , _gr_upscale_filter :: Bool
     , _gr_cloud_shadows :: Bool
     , _gr_distortions :: Bool
     , _gr_bloom :: Bool
@@ -152,6 +153,7 @@ defaultConfig =
         { _volume_master = 1
         , _volume_sound = 1
         , _volume_music = 0
+        , _gr_upscale_filter = True
         , _gr_cloud_shadows = True
         , _gr_bloom = True
         , _gr_shadow_rendering = GeoObjShads
diff --git a/src/Dodge/Menu.hs b/src/Dodge/Menu.hs
index cd6e8f8a1..bcc79e571 100644
--- a/src/Dodge/Menu.hs
+++ b/src/Dodge/Menu.hs
@@ -189,6 +189,7 @@ graphicsMenuOptions :: [MenuOption]
 graphicsMenuOptions =
     [ enumOption gr_world_res "World resolution" (uvIOEffects .~ updatePreload)
     , enumOption gr_downsize_res "Downsize resolution" (uvIOEffects .~ updatePreload)
+    , boolOption gr_upscale_filter "UPSCALE FILTER"
     , enumOption gr_shadow_rendering "SHADOW RENDERING" id
     , enumOption gr_shadows_on_clouds "SHADOW DETAIL ON CLOUDS" id
     , enumOption gr_shadow_size "SHADOW DETAIL" id
diff --git a/src/Dodge/Render.hs b/src/Dodge/Render.hs
index 9217dfa5f..5deb87df6 100644
--- a/src/Dodge/Render.hs
+++ b/src/Dodge/Render.hs
@@ -368,8 +368,10 @@ doDrawing' win pdata u = do
         [] -> do
             glBindTextureUnit 0 $ pdata ^. fboBase . _2 . _1 . unTO
             glBindFramebuffer GL_FRAMEBUFFER 0
-            glUseProgram (pdata ^. textureAntiaShader)
-            glUniform2f 0 (windowXFloat cfig) (windowYFloat cfig)
+            if (cfig ^. gr_upscale_filter) then do
+                glUseProgram (pdata ^. textureAntiaShader)
+                glUniform2f 0 (windowXFloat cfig) (windowYFloat cfig)
+            else glUseProgram (pdata ^. fullscreenShader)
             --glDrawArrays GL_TRIANGLES 0 6
             glDrawArrays GL_TRIANGLES 0 3
         rs' -> do