diff --git a/public/js/book-texture-renderer-module.js b/public/js/book-texture-renderer-module.js
index a83827b..0535700 100644
--- a/public/js/book-texture-renderer-module.js
+++ b/public/js/book-texture-renderer-module.js
@@ -679,13 +679,24 @@ class BookTextureRendererModule extends BaseModule {
         const timedRegions = [];
         const textRegions = sortedRegions.filter(region => !(region.fixedDurationMs > 0));
         const fixedRegions = sortedRegions.filter(region => region.fixedDurationMs > 0);
-        let fallbackDelay = 0;
         const totalArea = textRegions.reduce((sum, region) => sum + Math.max(1, region.timingArea || region.area), 0);
         const lineHeight = Math.max(1, Number(this.metrics?.typographyLineHeightPx || 1));
         const estimatedTextWidth = totalArea / lineHeight;
-        const totalDuration = requestedTotalDuration > 1
+        const baseDuration = requestedTotalDuration > 1
             ? requestedTotalDuration
             : Math.max(800, estimatedTextWidth * 16);
+        // Word-proportional scaling: these regions may cover only part of the block (the
+        // rest is on another spread this reveal does not include). Reveal only this portion's
+        // share of the block TTS, offset by the words before it, so the page reveals at
+        // normal pace and flips when its words are spoken — the continuation then resumes on
+        // the next spread instead of the page absorbing the whole TTS. When the regions cover
+        // the whole block (unified plan or single-page block) this is a no-op.
+        const totalBlockWords = Array.isArray(animation.wordTimings) ? animation.wordTimings.length : 0;
+        const collectedWords = textRegions.reduce((sum, region) => sum + Math.max(0, Number(region.blockWordCount || 0)), 0);
+        const wordsBefore = textRegions.reduce((min, region) => Math.min(min, Math.max(0, Number(region.blockWordStart || 0))), Number.POSITIVE_INFINITY);
+        const useWordShare = totalBlockWords > 0 && collectedWords > 0 && collectedWords < totalBlockWords;
+        const totalDuration = useWordShare ? baseDuration * (collectedWords / totalBlockWords) : baseDuration;
+        let fallbackDelay = useWordShare && Number.isFinite(wordsBefore) ? baseDuration * (wordsBefore / totalBlockWords) : 0;
         textRegions.forEach((region) => {
             const duration = totalArea > 0
                 ? Math.max(1, totalDuration * (Math.max(1, region.timingArea || region.area) / totalArea))
diff --git a/public/js/webgl-book-lab.js b/public/js/webgl-book-lab.js
index b192b2e..7074792 100644
--- a/public/js/webgl-book-lab.js
+++ b/public/js/webgl-book-lab.js
@@ -3114,20 +3114,21 @@ function prepareStaticPageForFlip(flip, prewarm = null) {
         hasBackTexture: Boolean(backTexture || getBlankPageTexture()),
         sourceTextureMatchesBackTexture: sourceTexture === (backTexture || getBlankPageTexture())
     };
-    if (flip.direction > 0) {
-        const blankTexture = getBlankPageTexture();
-        if (blankTexture && materials.rightPage.map !== blankTexture) {
-            clearPageReveal('right', 'page-flip-start', { preserveBaseTexture: sourceSide === 'right' });
-            materials.rightPage.map = blankTexture;
-            materials.rightPage.needsUpdate = true;
-        }
-    } else if (flip.direction < 0) {
-        const blankTexture = getBlankPageTexture();
-        if (blankTexture && materials.leftPage.map !== blankTexture) {
-            clearPageReveal('left', 'page-flip-start', { preserveBaseTexture: sourceSide === 'left' });
-            materials.leftPage.map = blankTexture;
-            materials.leftPage.needsUpdate = true;
-        }
+    // The page lifts from the source side, uncovering the target spread's same-side page
+    // beneath it. Show that target page now (hidden under the lifting page at t=0, then
+    // revealed as it turns away) instead of a blank that pops in at the end. If that side
+    // has a pending reveal (playback), keep it blank so activate lands the masked reveal.
+    const revealedSide = sourceSide;
+    const revealedMaterial = revealedSide === 'left' ? materials.leftPage : materials.rightPage;
+    const revealedDeferred = Array.isArray(flip.deferRevealSides) && flip.deferRevealSides.includes(revealedSide);
+    const revealedMeta = getPaginationPageMeta(targetPages[revealedSide]) || makeBlankPageMeta(targetPages[revealedSide]);
+    const revealedTexture = (revealedDeferred || revealedMeta.kind === 'blank')
+        ? getBlankPageTexture()
+        : (pageTextureStore?.getResidentTextureForMeta?.(revealedMeta) || getBlankPageTexture());
+    clearPageReveal(revealedSide, 'page-flip-start', { preserveBaseTexture: true });
+    if (revealedTexture && revealedMaterial.map !== revealedTexture) {
+        revealedMaterial.map = revealedTexture;
+        revealedMaterial.needsUpdate = true;
     }
     markPageTextureTiming('flipTexturePreflight:ready', {
         ...lastFlipTexturePreflight,