diff --git a/index.html b/index.html
index 6fee23d..d46896b 100644
--- a/index.html
+++ b/index.html
@@ -174,7 +174,6 @@
 
     const version = versions[getParam("version", "1999")] || versions["1999"];
 
-    const sharpness = parseFloat(getParam("sharpness", 0.5));
     const animationSpeed = parseFloat(getParam("animationSpeed", 1));
     const fallSpeed = parseFloat(getParam("fallSpeed", 1)) * version.fallSpeed;
     const cycleSpeed = parseFloat(getParam("cycleSpeed", 1)) * version.cycleSpeed;
@@ -215,7 +214,6 @@
       numColumns,
       numFontColumns,
       raindropLength,
-      sharpness,
       showComputationTexture: effect === "none",
       slant,
     });
@@ -263,11 +261,11 @@
     composer.passes[composer.passes.length - 1].renderToScreen = true;
 
     const windowResize = () => {
-      const [width, height] = [window.innerWidth, window.innerHeight];
+      const [width, height, pixelRatio] = [window.innerWidth, window.innerHeight, window.devicePixelRatio];
       matrixRenderer.resize(width, height);
       renderer.setSize(width, height);
-      composer.setSize(width, height);
-      bloomPass.setSize( window.innerWidth, window.innerHeight );
+      composer.setSize(width * pixelRatio, height * pixelRatio);
+      bloomPass.setSize( window.innerWidth * pixelRatio, window.innerHeight * pixelRatio );
     }
     window.addEventListener("resize", windowResize, false);
     window.addEventListener("orientationchange", windowResize, false);
diff --git a/js/MatrixRenderer.js b/js/MatrixRenderer.js
index ef15a50..5701d1e 100644
--- a/js/MatrixRenderer.js
+++ b/js/MatrixRenderer.js
@@ -1,6 +1,5 @@
 const makeMatrixRenderer = (renderer, {
   fontTexture,
-  sharpness,
   numColumns,
   animationSpeed, fallSpeed, cycleSpeed,
   glyphSequenceLength,
@@ -178,7 +177,6 @@ const glyphVariable = gpuCompute.addVariable(
         glyphs: { type: "t", value: glyphRTT },
         msdf: { type: "t", value: fontTexture },
         numColumns: {type: "f", value: numColumns},
-        sharpness: { type: "f", value: sharpness },
         numFontColumns: {type: "f", value: numFontColumns},
         resolution: {type: "v2", value: new THREE.Vector2() },
         slant: {type: "v2", value: new THREE.Vector2(Math.cos(slant), Math.sin(slant)) },
@@ -201,9 +199,7 @@ const glyphVariable = gpuCompute.addVariable(
       #extension GL_OES_standard_derivatives: enable
       #endif
       precision lowp float;
-      #define BIG_ENOUGH 0.001
-      #define MODIFIED_ALPHATEST (0.02 * isBigEnough / BIG_ENOUGH)
-      uniform float sharpness;
+
       uniform sampler2D msdf;
       uniform sampler2D glyphs;
       uniform float numColumns;
@@ -262,16 +258,7 @@ const glyphVariable = gpuCompute.addVariable(
         // The rest is straight up MSDF
         float sigDist = median(sample.r, sample.g, sample.b) - 0.5;
         float alpha = clamp(sigDist/fwidth(sigDist) + 0.5, 0.0, 1.0);
-        float dscale = 0.353505 / sharpness;
-        vec2 duv = dscale * (dFdx(uv) + dFdy(uv));
-        float isBigEnough = max(abs(duv.x), abs(duv.y));
-        if (isBigEnough > BIG_ENOUGH) {
-          float ratio = BIG_ENOUGH / isBigEnough;
-          alpha = ratio * alpha + (1.0 - ratio) * (sigDist + 0.5);
-        }
 
-        if (isBigEnough <= BIG_ENOUGH && alpha < 0.5) { discard; return; }
-        if (alpha < 0.5 * MODIFIED_ALPHATEST) { discard; return; }
         gl_FragColor = vec4(vec3(brightness * alpha), 1.0);
       }
       `