diff --git a/src/pages/editor/utils/blurOverlayLayout.ts b/src/pages/editor/utils/blurOverlayLayout.ts
index bbc5d48..d2010fb 100644
--- a/src/pages/editor/utils/blurOverlayLayout.ts
+++ b/src/pages/editor/utils/blurOverlayLayout.ts
@@ -33,8 +33,16 @@ export function computeBlurOverlayGeometry(
 ): BlurOverlayGeometry {
   const rotation = obj.rotation ?? 0;
   const shapeType = obj.shapeType ?? "square";
-  const anchorX = livePosition?.x ?? (obj.x ?? 0) * scale;
-  const anchorY = livePosition?.y ?? (obj.y ?? 0) * scale;
+  const anchorX =
+    livePosition?.x ??
+    (shapeType === "triangle" || shapeType === "abstract"
+      ? ((obj.x ?? 0) + (obj.width ?? 100) / 2) * scale
+      : (obj.x ?? 0) * scale);
+  const anchorY =
+    livePosition?.y ??
+    (shapeType === "triangle" || shapeType === "abstract"
+      ? ((obj.y ?? 0) + (obj.height ?? 100) / 2) * scale
+      : (obj.y ?? 0) * scale);
 
   if (shapeType === "circle") {
     const sizePx = (obj.width ?? 100) * scale;
diff --git a/src/pages/viewer/components/BookPage.tsx b/src/pages/viewer/components/BookPage.tsx
index 5b6d9e7..2fee238 100644
--- a/src/pages/viewer/components/BookPage.tsx
+++ b/src/pages/viewer/components/BookPage.tsx
@@ -11,7 +11,11 @@ import {
   resolveTextMaxWidth,
   usesWrappedLayout,
 } from '@/pages/editor/utils/textStyle';
-import { getCssBlurStyle } from '@/pages/editor/utils/shapeBlur';
+import {
+  buildBlurOverlayStyle,
+  buildBlurStackEntries,
+  isBlurBackdropObject,
+} from '@/pages/editor/utils/blurOverlayLayout';
 import { getCssBorderRadius } from '@/pages/editor/utils/borderRadius';
 import '@/pages/viewer/styles/entranceAnimations.css';
 import { mergeEntranceAnimationStyle } from '@/pages/viewer/utils/entranceAnimationStyle';
@@ -213,11 +217,15 @@ const BookPage = memo(forwardRef<HTMLDivElement, BookPageProps>(
         return null;
       }
 
+      // Blur shapes use backdrop-filter overlays (see blur stack below), not CSS filter on the shape.
+      if (isBlurBackdropObject(obj)) {
+        return null;
+      }
+
       const objectFillStyle: React.CSSProperties =
         obj.fillType === 'gradient' && obj.gradient
           ? { backgroundImage: toCssLinearGradient(obj.gradient) }
           : { backgroundColor: obj.fill || 'transparent' };
-      const shapeBlurStyle = getCssBlurStyle(obj.blur, scale);
 
       switch (obj.type) {
         case 'text': {
@@ -537,7 +545,6 @@ const BookPage = memo(forwardRef<HTMLDivElement, BookPageProps>(
                     height: `${radius * 2}px`,
                     borderRadius: '50%',
                     ...objectFillStyle,
-                    ...shapeBlurStyle,
                     border: hasStroke && obj.stroke
                       ? `${actualStrokeWidth * scale}px solid ${obj.stroke}`
                       : 'none',
@@ -610,7 +617,6 @@ const BookPage = memo(forwardRef<HTMLDivElement, BookPageProps>(
                     width: `${size}px`,
                     height: `${size}px`,
                     opacity: (obj.opacity ?? 100) / 100,
-                    ...shapeBlurStyle,
                     transform: obj.rotation ? `rotate(${obj.rotation}deg)` : undefined,
                     transformOrigin: 'center center',
                     zIndex: index,
@@ -669,7 +675,6 @@ const BookPage = memo(forwardRef<HTMLDivElement, BookPageProps>(
                     height: `${radius * 2}px`,
                     clipPath: 'polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%)',
                     ...objectFillStyle,
-                    ...shapeBlurStyle,
                     border: obj.stroke
                       ? `${(obj.strokeWidth || 1) * scale}px solid ${obj.stroke}`
                       : 'none',
@@ -692,7 +697,6 @@ const BookPage = memo(forwardRef<HTMLDivElement, BookPageProps>(
             width: `${(obj.width || 100) * scale}px`,
             height: `${(obj.height || 100) * scale}px`,
             ...objectFillStyle,
-            ...shapeBlurStyle,
             borderRadius: `${Math.max(0, (obj.borderRadius || 0) * scale)}px`,
             border: hasStroke && obj.stroke
               ? `${actualStrokeWidth * scale}px solid ${obj.stroke}`
@@ -1102,6 +1106,34 @@ const BookPage = memo(forwardRef<HTMLDivElement, BookPageProps>(
           )}
           <div style={{ position: 'absolute', inset: 0, zIndex: 1 }}>
             {page.elements.map((element, index) => renderObject(element, index, page.elements))}
+            {buildBlurStackEntries(page.elements).map((entry) => {
+              const blurIndex = page.elements.findIndex((el) => el.id === entry.blurObject.id);
+              const blurOverlayStyle = buildBlurOverlayStyle(entry.blurObject, scale);
+
+              return (
+                <div
+                  key={`blur-stack-${entry.key}`}
+                  style={{ position: 'absolute', inset: 0, pointerEvents: 'none' }}
+                >
+                  <div
+                    style={withEntrance(
+                      blurOverlayStyle,
+                      entry.blurObject,
+                      blurIndex >= 0 ? blurIndex : 0,
+                      {
+                        transformOrigin: blurOverlayStyle.transformOrigin,
+                        rotationDeg: entry.blurObject.rotation ?? 0,
+                      },
+                    )}
+                  />
+                  {entry.occlusionObjects.map((obj) => {
+                    const index = page.elements.findIndex((el) => el.id === obj.id);
+                    if (index < 0) return null;
+                    return renderObject(obj, index, page.elements);
+                  })}
+                </div>
+              );
+            })}
           </div>
         </div>
         {showLoadingOverlay && (