diff --git a/sway/desktop/shaders/corner.frag b/sway/desktop/shaders/corner.frag
index 7540d446..a8465d60 100644
--- a/sway/desktop/shaders/corner.frag
+++ b/sway/desktop/shaders/corner.frag
@@ -18,13 +18,14 @@ float roundedBoxSDF(vec2 center, vec2 size, float radius) {
 
 void main() {
     vec2 center = gl_FragCoord.xy - position - half_size;
-    float distance = roundedBoxSDF(center, half_size - half_thickness, radius + half_thickness);
-    float smoothedAlphaOuter = 1.0 - smoothstep(-1.0, 1.0, distance - half_thickness);
+    float dist = roundedBoxSDF(center, half_size - half_thickness, radius + half_thickness);
+    float smoothedAlphaOuter = 1.0 - smoothstep(-1.0, 1.0, dist - half_thickness);
     // Create an inner circle that isn't as anti-aliased as the outer ring
-    float smoothedAlphaInner = 1.0 - smoothstep(-1.0, 0.5, distance + half_thickness);
+    float smoothedAlphaInner = 1.0 - smoothstep(-1.0, 0.5, dist + half_thickness);
     gl_FragColor = mix(vec4(0), v_color, smoothedAlphaOuter - smoothedAlphaInner);
 
-    if ((v_color.a == 1.0 && gl_FragColor.a <= 0.5) || gl_FragColor.a <= 0.01) {
+    // Discards outside the curve and transparent pixels
+    if (dist > half_thickness || gl_FragColor.a == 0.0) {
         discard;
         return;
     }
diff --git a/sway/desktop/shaders/quad.frag b/sway/desktop/shaders/quad.frag
index e5eed4b6..3b2afd65 100644
--- a/sway/desktop/shaders/quad.frag
+++ b/sway/desktop/shaders/quad.frag
@@ -5,7 +5,7 @@ varying vec2 v_texcoord;
 void main() {
     gl_FragColor = v_color;
 
-    if (gl_FragColor.a <= 0.01){
+    if (gl_FragColor.a == 0.0) {
         discard;
     }
 }
diff --git a/sway/desktop/shaders/quad_round.frag b/sway/desktop/shaders/quad_round.frag
index 390b77e1..ad486651 100644
--- a/sway/desktop/shaders/quad_round.frag
+++ b/sway/desktop/shaders/quad_round.frag
@@ -7,13 +7,14 @@ uniform vec2 position;
 uniform float radius;
 
 void main() {
-    vec2 half_size = size / 2.0;
+    vec2 half_size = size * 0.5;
     vec2 q = abs(gl_FragCoord.xy - position - half_size) - half_size + radius;
-    float distance = min(max(q.x,q.y),0.0) + length(max(q,0.0)) - radius;
-    float smoothedAlpha = 1.0 - smoothstep(-1.0, 0.5, distance);
+    float dist = min(max(q.x,q.y), 0.0) + length(max(q, 0.0)) - radius;
+    float smoothedAlpha = 1.0 - smoothstep(-1.0, 0.5, dist);
     gl_FragColor = mix(vec4(0), v_color, smoothedAlpha);
 
-    if (gl_FragColor.a <= 0.01){
+    // Discards outside the curve and transparent pixels
+    if (dist > 0.0 || gl_FragColor.a == 0.0) {
         discard;
     }
 }
diff --git a/sway/desktop/shaders/quad_round_tl.frag b/sway/desktop/shaders/quad_round_tl.frag
index f7886188..76283679 100644
--- a/sway/desktop/shaders/quad_round_tl.frag
+++ b/sway/desktop/shaders/quad_round_tl.frag
@@ -8,11 +8,12 @@ uniform float radius;
 
 void main() {
     vec2 q = abs(gl_FragCoord.xy - position - size) - size + radius;
-    float distance = min(max(q.x,q.y),0.0) + length(max(q,0.0)) - radius;
-    float smoothedAlpha = 1.0 - smoothstep(-1.0, 0.5, distance);
+    float dist = min(max(q.x,q.y), 0.0) + length(max(q, 0.0)) - radius;
+    float smoothedAlpha = 1.0 - smoothstep(-1.0, 0.5, dist);
     gl_FragColor = mix(vec4(0), v_color, smoothedAlpha);
 
-    if (gl_FragColor.a <= 0.01){
+    // Discards outside the curve and transparent pixels
+    if (dist > 0.0 || gl_FragColor.a == 0.0) {
         discard;
     }
 }
diff --git a/sway/desktop/shaders/quad_round_tr.frag b/sway/desktop/shaders/quad_round_tr.frag
index 767bf3e9..392af76e 100644
--- a/sway/desktop/shaders/quad_round_tr.frag
+++ b/sway/desktop/shaders/quad_round_tr.frag
@@ -8,11 +8,12 @@ uniform float radius;
 
 void main() {
     vec2 q = abs(gl_FragCoord.xy - position - vec2(0, size.y)) - size + radius;
-    float distance = min(max(q.x,q.y),0.0) + length(max(q,0.0)) - radius;
-    float smoothedAlpha = 1.0 - smoothstep(-1.0, 0.5, distance);
+    float dist = min(max(q.x,q.y), 0.0) + length(max(q, 0.0)) - radius;
+    float smoothedAlpha = 1.0 - smoothstep(-1.0, 0.5, dist);
     gl_FragColor = mix(vec4(0), v_color, smoothedAlpha);
 
-    if (gl_FragColor.a <= 0.01){
+    // Discards outside the curve and transparent pixels
+    if (dist > 0.0 || gl_FragColor.a == 0.0) {
         discard;
     }
 }
diff --git a/sway/desktop/shaders/tex_external.frag b/sway/desktop/shaders/tex_external.frag
index 354aa9ec..3d953bcd 100644
--- a/sway/desktop/shaders/tex_external.frag
+++ b/sway/desktop/shaders/tex_external.frag
@@ -29,13 +29,18 @@ void main() {
     if (!has_titlebar || gl_FragCoord.y - position.y > radius) {
         vec2 corner_distance = min(gl_FragCoord.xy - position, size + position - gl_FragCoord.xy);
         if (max(corner_distance.x, corner_distance.y) < radius) {
-            float d = radius - distance(corner_distance, vec2(radius));
-            float smooth = smoothstep(-1.0f, 0.5f, d);
+            float dist = radius - distance(corner_distance, vec2(radius));
+            float smooth = smoothstep(-1.0f, 0.5f, dist);
             gl_FragColor = mix(vec4(0), gl_FragColor, smooth);
+            // Discards pixels outside the curve
+            if (dist < 0.0) {
+                discard;
+                return;
+            }
         }
     }
 
-    if (gl_FragColor.a <= 0.01){
+    if (gl_FragColor.a == 0.0) {
         discard;
     }
 }
diff --git a/sway/desktop/shaders/tex_rgba.frag b/sway/desktop/shaders/tex_rgba.frag
index a57ad3bb..a5c21cef 100644
--- a/sway/desktop/shaders/tex_rgba.frag
+++ b/sway/desktop/shaders/tex_rgba.frag
@@ -27,13 +27,18 @@ void main() {
     if (!has_titlebar || gl_FragCoord.y - position.y > radius) {
         vec2 corner_distance = min(gl_FragCoord.xy - position, size + position - gl_FragCoord.xy);
         if (max(corner_distance.x, corner_distance.y) < radius) {
-            float d = radius - distance(corner_distance, vec2(radius));
-            float smooth = smoothstep(-1.0f, 0.5f, d);
+            float dist = radius - distance(corner_distance, vec2(radius));
+            float smooth = smoothstep(-1.0f, 0.5f, dist);
             gl_FragColor = mix(vec4(0), gl_FragColor, smooth);
+            // Discards pixels outside the curve
+            if (dist < 0.0) {
+                discard;
+                return;
+            }
         }
     }
 
-    if (gl_FragColor.a <= 0.01){
+    if (gl_FragColor.a == 0.0) {
         discard;
     }
 }
diff --git a/sway/desktop/shaders/tex_rgbx.frag b/sway/desktop/shaders/tex_rgbx.frag
index 429ad0a7..a7297620 100644
--- a/sway/desktop/shaders/tex_rgbx.frag
+++ b/sway/desktop/shaders/tex_rgbx.frag
@@ -26,13 +26,18 @@ void main() {
     if (!has_titlebar || gl_FragCoord.y - position.y > radius) {
         vec2 corner_distance = min(gl_FragCoord.xy - position, size + position - gl_FragCoord.xy);
         if (max(corner_distance.x, corner_distance.y) < radius) {
-            float d = radius - distance(corner_distance, vec2(radius));
-            float smooth = smoothstep(-1.0f, 0.5f, d);
+            float dist = radius - distance(corner_distance, vec2(radius));
+            float smooth = smoothstep(-1.0f, 0.5f, dist);
             gl_FragColor = mix(vec4(0), gl_FragColor, smooth);
+            // Discards pixels outside the curve
+            if (dist < 0.0) {
+                discard;
+                return;
+            }
         }
     }
 
-    if (gl_FragColor.a <= 0.01){
+    if (gl_FragColor.a == 0.0) {
         discard;
     }
 }