diff --git a/demos/transformer/src/main/java/androidx/media3/demo/transformer/TransformerActivity.java b/demos/transformer/src/main/java/androidx/media3/demo/transformer/TransformerActivity.java
index b3f6204814..61a23601dc 100644
--- a/demos/transformer/src/main/java/androidx/media3/demo/transformer/TransformerActivity.java
+++ b/demos/transformer/src/main/java/androidx/media3/demo/transformer/TransformerActivity.java
@@ -617,7 +617,7 @@ public final class TransformerActivity extends AppCompatActivity {
     if (selectedEffects[ConfigurationActivity.BITMAP_OVERLAY_INDEX]) {
       OverlaySettings overlaySettings =
           new OverlaySettings.Builder()
-              .setAlpha(
+              .setAlphaScale(
                   bundle.getFloat(
                       ConfigurationActivity.BITMAP_OVERLAY_ALPHA, /* defaultValue= */ 1))
               .build();
@@ -631,7 +631,7 @@ public final class TransformerActivity extends AppCompatActivity {
     if (selectedEffects[ConfigurationActivity.TEXT_OVERLAY_INDEX]) {
       OverlaySettings overlaySettings =
           new OverlaySettings.Builder()
-              .setAlpha(
+              .setAlphaScale(
                   bundle.getFloat(ConfigurationActivity.TEXT_OVERLAY_ALPHA, /* defaultValue= */ 1))
               .build();
       SpannableString overlayText =
diff --git a/libraries/effect/src/androidTest/java/androidx/media3/effect/OverlayShaderProgramPixelTest.java b/libraries/effect/src/androidTest/java/androidx/media3/effect/OverlayShaderProgramPixelTest.java
index 7722a9a246..a9a46867ee 100644
--- a/libraries/effect/src/androidTest/java/androidx/media3/effect/OverlayShaderProgramPixelTest.java
+++ b/libraries/effect/src/androidTest/java/androidx/media3/effect/OverlayShaderProgramPixelTest.java
@@ -253,7 +253,7 @@ public class OverlayShaderProgramPixelTest {
   @RequiresNonNull("testId")
   public void drawFrame_translucentBitmapOverlay_blendsBitmapIntoFrame() throws Exception {
     Bitmap bitmap = readBitmap(OVERLAY_PNG_ASSET_PATH);
-    OverlaySettings overlaySettings = new OverlaySettings.Builder().setAlpha(0.5f).build();
+    OverlaySettings overlaySettings = new OverlaySettings.Builder().setAlphaScale(0.5f).build();
     BitmapOverlay translucentBitmapOverlay =
         BitmapOverlay.createStaticBitmapOverlay(bitmap, overlaySettings);
     overlayShaderProgram =
@@ -277,7 +277,7 @@ public class OverlayShaderProgramPixelTest {
   @RequiresNonNull("testId")
   public void drawFrame_transparentTextOverlay_blendsBitmapIntoFrame() throws Exception {
     SpannableString overlayText = new SpannableString(/* source= */ "Text styling");
-    OverlaySettings overlaySettings = new OverlaySettings.Builder().setAlpha(0f).build();
+    OverlaySettings overlaySettings = new OverlaySettings.Builder().setAlphaScale(0f).build();
     overlayText.setSpan(
         new ForegroundColorSpan(Color.GRAY),
         /* start= */ 0,
@@ -400,7 +400,7 @@ public class OverlayShaderProgramPixelTest {
         new OverlaySettings.Builder().setVideoFrameAnchor(0.5f, 0.5f).build();
     TextOverlay textOverlay = TextOverlay.createStaticTextOverlay(overlayText, overlaySettings1);
     Bitmap bitmap = readBitmap(OVERLAY_PNG_ASSET_PATH);
-    OverlaySettings overlaySettings2 = new OverlaySettings.Builder().setAlpha(0.5f).build();
+    OverlaySettings overlaySettings2 = new OverlaySettings.Builder().setAlphaScale(0.5f).build();
     BitmapOverlay bitmapOverlay = BitmapOverlay.createStaticBitmapOverlay(bitmap, overlaySettings2);
     overlayShaderProgram =
         new OverlayEffect(ImmutableList.of(textOverlay, bitmapOverlay))
diff --git a/libraries/effect/src/main/java/androidx/media3/effect/OverlaySettings.java b/libraries/effect/src/main/java/androidx/media3/effect/OverlaySettings.java
index 35e947c7e8..18b3f5881c 100644
--- a/libraries/effect/src/main/java/androidx/media3/effect/OverlaySettings.java
+++ b/libraries/effect/src/main/java/androidx/media3/effect/OverlaySettings.java
@@ -26,7 +26,7 @@ import com.google.errorprone.annotations.CanIgnoreReturnValue;
 @UnstableApi
 public final class OverlaySettings {
   public final boolean useHdr;
-  public final float alpha;
+  public final float alphaScale;
   public final Pair<Float, Float> videoFrameAnchor;
   public final Pair<Float, Float> overlayAnchor;
   public final Pair<Float, Float> scale;
@@ -34,13 +34,13 @@ public final class OverlaySettings {
 
   private OverlaySettings(
       boolean useHdr,
-      float alpha,
+      float alphaScale,
       Pair<Float, Float> videoFrameAnchor,
       Pair<Float, Float> overlayAnchor,
       Pair<Float, Float> scale,
       float rotationDegrees) {
     this.useHdr = useHdr;
-    this.alpha = alpha;
+    this.alphaScale = alphaScale;
     this.videoFrameAnchor = videoFrameAnchor;
     this.overlayAnchor = overlayAnchor;
     this.scale = scale;
@@ -50,7 +50,7 @@ public final class OverlaySettings {
   /** A builder for {@link OverlaySettings} instances. */
   public static final class Builder {
     private boolean useHdr;
-    private float alpha;
+    private float alphaScale;
     private Pair<Float, Float> videoFrameAnchor;
     private Pair<Float, Float> overlayAnchor;
     private Pair<Float, Float> scale;
@@ -58,7 +58,7 @@ public final class OverlaySettings {
 
     /** Creates a new {@link Builder}. */
     public Builder() {
-      alpha = 1f;
+      alphaScale = 1f;
       videoFrameAnchor = Pair.create(0f, 0f);
       overlayAnchor = Pair.create(0f, 0f);
       scale = Pair.create(1f, 1f);
@@ -80,15 +80,15 @@ public final class OverlaySettings {
     /**
      * Sets the alpha scale value of the overlay, altering its translucency.
      *
-     * <p>An {@code alpha} value of {@code 1} means no change is applied. A value below {@code 1}
-     * increases translucency, and a value above {@code 1} reduces translucency.
+     * <p>An {@code alphaScale} value of {@code 1} means no change is applied. A value below {@code
+     * 1} increases translucency, and a value above {@code 1} reduces translucency.
      *
      * <p>Set to always return {@code 1} by default.
      */
     @CanIgnoreReturnValue
-    public Builder setAlpha(@FloatRange(from = 0) float alpha) {
-      checkArgument(0 <= alpha, "Alpha needs to be more than or equal to zero.");
-      this.alpha = alpha;
+    public Builder setAlphaScale(@FloatRange(from = 0) float alphaScale) {
+      checkArgument(0 <= alphaScale, "alphaScale needs to be greater than or equal to zero.");
+      this.alphaScale = alphaScale;
       return this;
     }
 
@@ -165,7 +165,7 @@ public final class OverlaySettings {
     /** Creates an instance of {@link OverlaySettings}, using defaults if values are unset. */
     public OverlaySettings build() {
       return new OverlaySettings(
-          useHdr, alpha, videoFrameAnchor, overlayAnchor, scale, rotationDegrees);
+          useHdr, alphaScale, videoFrameAnchor, overlayAnchor, scale, rotationDegrees);
     }
   }
 }
diff --git a/libraries/effect/src/main/java/androidx/media3/effect/OverlayShaderProgram.java b/libraries/effect/src/main/java/androidx/media3/effect/OverlayShaderProgram.java
index f1faa82cb3..3346cdbd8e 100644
--- a/libraries/effect/src/main/java/androidx/media3/effect/OverlayShaderProgram.java
+++ b/libraries/effect/src/main/java/androidx/media3/effect/OverlayShaderProgram.java
@@ -276,7 +276,8 @@ import com.google.common.collect.ImmutableList;
               Util.formatInvariant("uTransformationMatrix%d", texUnitIndex), transformationMatrix);
 
           glProgram.setFloatUniform(
-              Util.formatInvariant("uOverlayAlpha%d", texUnitIndex), overlaySettings.alpha);
+              Util.formatInvariant("uOverlayAlphaScale%d", texUnitIndex),
+              overlaySettings.alphaScale);
         }
       }
       glProgram.setSamplerTexIdUniform("uVideoTexSampler0", inputTexId, /* texUnitIndex= */ 0);
@@ -387,7 +388,7 @@ import com.google.common.collect.ImmutableList;
     for (int texUnitIndex = 1; texUnitIndex <= numOverlays; texUnitIndex++) {
       shader
           .append(Util.formatInvariant("uniform sampler2D uOverlayTexSampler%d;\n", texUnitIndex))
-          .append(Util.formatInvariant("uniform float uOverlayAlpha%d;\n", texUnitIndex))
+          .append(Util.formatInvariant("uniform float uOverlayAlphaScale%d;\n", texUnitIndex))
           .append(Util.formatInvariant("varying vec2 vOverlayTexSamplingCoord%d;\n", texUnitIndex));
     }
 
@@ -405,7 +406,7 @@ import com.google.common.collect.ImmutableList;
                   texUnitIndex))
           .append(
               Util.formatInvariant(
-                  "    uOverlayTexSampler%d, vOverlayTexSamplingCoord%d, uOverlayAlpha%d);\n",
+                  "    uOverlayTexSampler%d, vOverlayTexSamplingCoord%d, uOverlayAlphaScale%d);\n",
                   texUnitIndex, texUnitIndex, texUnitIndex))
           .append(Util.formatInvariant("  vec4 opticalOverlayColor%d = vec4(\n", texUnitIndex))
           .append(