diff --git a/editor/assets/effects/pipeline/post-process/fsr.effect b/editor/assets/effects/pipeline/post-process/fsr.effect
index 90728255e88..d7afb9fcc6a 100644
--- a/editor/assets/effects/pipeline/post-process/fsr.effect
+++ b/editor/assets/effects/pipeline/post-process/fsr.effect
@@ -80,7 +80,8 @@ CCProgram fs-easu %{
       rendersize, rendersize, texSize.zw
     );
     FsrEasuF(c, gl_FragCoord.xy, con0, con1, con2, con3);
-    fragColor = vec4(c.xyz, 1.);
+    float alpha = texture(outputResultMap, v_uv).a;
+    fragColor = vec4(c.xyz, alpha);
   }
   
 }%
@@ -115,6 +116,7 @@ CCProgram fs-rcas %{
 
     // Perform RCAS pass
     vec3 col = FsrRcasF(gl_FragCoord.xy, con);
-    fragColor = vec4(col, 1.);
+    float alpha = texture(outputResultMap, v_uv).a;
+    fragColor = vec4(col, alpha);
   }
 }%
diff --git a/editor/assets/effects/pipeline/post-process/fxaa-hq.effect b/editor/assets/effects/pipeline/post-process/fxaa-hq.effect
index 3f894f98fc2..1312f6e0508 100644
--- a/editor/assets/effects/pipeline/post-process/fxaa-hq.effect
+++ b/editor/assets/effects/pipeline/post-process/fxaa-hq.effect
@@ -35,7 +35,8 @@ CCProgram fxaa-edge-fs %{
 
   vec4 frag () {
     vec3 color = FxaaPixelShader(v_uv, sceneColorMap, texSize.zw);
-    return vec4(color, 1.0); 
+    float alpha = texture(sceneColorMap, v_uv).a;
+    return vec4(color, alpha); 
   }
 }%