diff --git a/.isu/issues.json b/.isu/issues.json
index 18e7324..c410dd4 100644
--- a/.isu/issues.json
+++ b/.isu/issues.json
@@ -1,5 +1,5 @@
 {
-  "next_id": 415,
+  "next_id": 416,
   "issues": [
     {
       "id": 1,
@@ -5091,6 +5091,19 @@
       "author": "piefev",
       "state": "open",
       "created_at": "2026-07-18T12:53:38Z"
+    },
+    {
+      "id": 415,
+      "repo": "we",
+      "title": "Opera parity remains blocked after glyph mask coverage ramp",
+      "body": "Parent: isu issue 281.\n\nThis pass steepened Metal glyph-mask coverage with a smoothstep ramp so supersampled glyph masks keep crisper subpixel edges. The focused Opera scenario improved, but still cannot remove its xfail.\n\nRepro:\n  cargo run -p we-e2e -- --scenario crates/e2e/scenarios/real-web/opera.com.we --out-dir crates/e2e/artifacts\n\nCurrent result after this pass:\n- desktop L96: 89.29% match (131604/1228500 px differ, tol=4, max_diff=0.1000%)\n- mobile L111: 82.70% match (56941/329160 px differ, tol=4, max_diff=0.1000%)\n- DOM and interactivity assertions pass; console captures only expected offline third-party fetch misses.\n\nArtifacts:\n- crates/e2e/artifacts/real-web/opera.com/desktop.png\n- crates/e2e/artifacts/real-web/opera.com/desktop.png.diff.png\n- crates/e2e/artifacts/real-web/opera.com/mobile.png\n- crates/e2e/artifacts/real-web/opera.com/mobile.png.diff.png\n\nRemaining visible blockers are still first-viewport WebP/image parity plus residual glyph antialiasing and small cookie-panel edge/text fidelity gaps. Keep crates/e2e/scenarios/real-web/opera.com.we xfailed until both Chromium screenshot assertions pass within the committed threshold.",
+      "labels": [
+        "real-web"
+      ],
+      "assigned": [],
+      "author": "piefev",
+      "state": "open",
+      "created_at": "2026-07-18T13:23:09Z"
     }
   ]
 }
diff --git a/crates/platform/src/metal.rs b/crates/platform/src/metal.rs
index 389f19d..b64aaf4 100644
--- a/crates/platform/src/metal.rs
+++ b/crates/platform/src/metal.rs
@@ -479,7 +479,10 @@ fragment float4 fragment_main(
             float coverage = clamp(0.5 - d / aa, 0.0, 1.0);
             c = float4(in.color.rgb, in.color.a * coverage);
         } else if (in.use_texture > 1.5) {
-            float coverage = tex.sample(samp, in.tex_coord).r;
+            // Glyph masks are supersampled coverage fields. Steepening the
+            // middle of the ramp keeps subpixel edges crisp without changing
+            // fully transparent or fully covered pixels.
+            float coverage = smoothstep(0.3, 0.7, tex.sample(samp, in.tex_coord).r);
             c = float4(in.color.rgb, in.color.a * coverage);
         } else {
             float4 tex_color = tex.sample(samp, in.tex_coord);
@@ -1948,7 +1951,8 @@ mod tests {
 
     #[test]
     fn shader_treats_mask_texture_as_alpha_coverage() {
-        assert!(SHADER_SOURCE.contains("float coverage = tex.sample(samp, in.tex_coord).r;"));
+        assert!(SHADER_SOURCE
+            .contains("float coverage = smoothstep(0.3, 0.7, tex.sample(samp, in.tex_coord).r);"));
         assert!(SHADER_SOURCE.contains("c = float4(in.color.rgb, in.color.a * coverage);"));
     }