diff --git a/assets/effects/sprite-old-photo.effect b/assets/effects/sprite-old-photo.effect
index b86ecf0..47fbc88 100644
--- a/assets/effects/sprite-old-photo.effect
+++ b/assets/effects/sprite-old-photo.effect
@@ -115,7 +115,8 @@ CCProgram fs %{
     vec4 srcColor = o;
     vec4 oldColor = getOldPhotoColor(srcColor);
 
-    o = srcColor + (oldColor - srcColor) * oldLevel;
+    // o = srcColor + (oldColor - srcColor) * oldLevel;
+    o = mix(srcColor, oldColor, oldLevel);
     #endif
     gl_FragColor = o;
   }
diff --git a/assets/effects/sprite-old-photo.effect.meta b/assets/effects/sprite-old-photo.effect.meta
index 86a3470..c0a0dfd 100644
--- a/assets/effects/sprite-old-photo.effect.meta
+++ b/assets/effects/sprite-old-photo.effect.meta
@@ -5,11 +5,11 @@
     {
       "glsl1": {
         "vert": "\nprecision highp float;\nuniform mediump mat4 cc_matViewProj;\nuniform mat4 cc_matWorld;\nattribute vec3 a_position;\nattribute vec4 a_color;\nvarying vec4 v_color;\n#if USE_TEXTURE\nattribute vec2 a_uv0;\nvarying vec2 v_uv0;\n#endif\nvoid main () {\n  vec4 pos = vec4(a_position, 1);\n  #if CC_USE_MODEL\n  pos = cc_matViewProj * cc_matWorld * pos;\n  #else\n  pos = cc_matViewProj * pos;\n  #endif\n  #if USE_TEXTURE\n  v_uv0 = a_uv0;\n  #endif\n  v_color = a_color;\n  gl_Position = pos;\n}",
-        "frag": "\nprecision highp float;\n#if USE_ALPHA_TEST\n  uniform float alphaThreshold;\n#endif\nvoid ALPHA_TEST (in vec4 color) {\n  #if USE_ALPHA_TEST\n      if (color.a < alphaThreshold) discard;\n  #endif\n}\nvoid ALPHA_TEST (in float alpha) {\n  #if USE_ALPHA_TEST\n      if (alpha < alphaThreshold) discard;\n  #endif\n}\nvarying vec4 v_color;\n#if USE_TEXTURE\nvarying vec2 v_uv0;\nuniform sampler2D texture;\n#endif\n#if USE_OLD_PHOTO\nuniform float oldLevel;\nvec4 getOldPhotoColor(vec4 color) {\n  float r = 0.393 * color.r + 0.769 * color.g + 0.189 * color.b;\n  float g = 0.349 * color.r + 0.686 * color.g + 0.168 * color.b;\n  float b = 0.272 * color.r + 0.534 * color.g + 0.131 * color.b;\n  return vec4(r, g, b, color.a);\n}\n#endif\nvoid main () {\n  vec4 o = vec4(1, 1, 1, 1);\n  #if USE_TEXTURE\n  o *= texture2D(texture, v_uv0);\n    #if CC_USE_ALPHA_ATLAS_TEXTURE\n    o.a *= texture2D(texture, v_uv0 + vec2(0, 0.5)).r;\n    #endif\n  #endif\n  o *= v_color;\n  ALPHA_TEST(o);\n  #if USE_OLD_PHOTO\n  vec4 srcColor = o;\n  vec4 oldColor = getOldPhotoColor(srcColor);\n  o = srcColor + (oldColor - srcColor) * oldLevel;\n  #endif\n  gl_FragColor = o;\n}"
+        "frag": "\nprecision highp float;\n#if USE_ALPHA_TEST\n  uniform float alphaThreshold;\n#endif\nvoid ALPHA_TEST (in vec4 color) {\n  #if USE_ALPHA_TEST\n      if (color.a < alphaThreshold) discard;\n  #endif\n}\nvoid ALPHA_TEST (in float alpha) {\n  #if USE_ALPHA_TEST\n      if (alpha < alphaThreshold) discard;\n  #endif\n}\nvarying vec4 v_color;\n#if USE_TEXTURE\nvarying vec2 v_uv0;\nuniform sampler2D texture;\n#endif\n#if USE_OLD_PHOTO\nuniform float oldLevel;\nvec4 getOldPhotoColor(vec4 color) {\n  float r = 0.393 * color.r + 0.769 * color.g + 0.189 * color.b;\n  float g = 0.349 * color.r + 0.686 * color.g + 0.168 * color.b;\n  float b = 0.272 * color.r + 0.534 * color.g + 0.131 * color.b;\n  return vec4(r, g, b, color.a);\n}\n#endif\nvoid main () {\n  vec4 o = vec4(1, 1, 1, 1);\n  #if USE_TEXTURE\n  o *= texture2D(texture, v_uv0);\n    #if CC_USE_ALPHA_ATLAS_TEXTURE\n    o.a *= texture2D(texture, v_uv0 + vec2(0, 0.5)).r;\n    #endif\n  #endif\n  o *= v_color;\n  ALPHA_TEST(o);\n  #if USE_OLD_PHOTO\n  vec4 srcColor = o;\n  vec4 oldColor = getOldPhotoColor(srcColor);\n  o = mix(srcColor, oldColor, oldLevel);\n  #endif\n  gl_FragColor = o;\n}"
       },
       "glsl3": {
         "vert": "\nprecision highp float;\nuniform CCGlobal {\n  highp   vec4 cc_time;\n  mediump vec4 cc_screenSize;\n  mediump vec4 cc_screenScale;\n  mediump vec4 cc_nativeSize;\n  highp   mat4 cc_matView;\n  mediump mat4 cc_matViewInv;\n  mediump mat4 cc_matProj;\n  mediump mat4 cc_matProjInv;\n  mediump mat4 cc_matViewProj;\n  mediump mat4 cc_matViewProjInv;\n  mediump vec4 cc_cameraPos;\n};\nuniform CCLocal {\n  mat4 cc_matWorld;\n  mat4 cc_matWorldIT;\n};\nin vec3 a_position;\nin vec4 a_color;\nout vec4 v_color;\n#if USE_TEXTURE\nin vec2 a_uv0;\nout vec2 v_uv0;\n#endif\nvoid main () {\n  vec4 pos = vec4(a_position, 1);\n  #if CC_USE_MODEL\n  pos = cc_matViewProj * cc_matWorld * pos;\n  #else\n  pos = cc_matViewProj * pos;\n  #endif\n  #if USE_TEXTURE\n  v_uv0 = a_uv0;\n  #endif\n  v_color = a_color;\n  gl_Position = pos;\n}",
-        "frag": "\nprecision highp float;\n#if USE_ALPHA_TEST\n  uniform ALPHA_TEST {\n    float alphaThreshold;\n  };\n#endif\nvoid ALPHA_TEST (in vec4 color) {\n  #if USE_ALPHA_TEST\n      if (color.a < alphaThreshold) discard;\n  #endif\n}\nvoid ALPHA_TEST (in float alpha) {\n  #if USE_ALPHA_TEST\n      if (alpha < alphaThreshold) discard;\n  #endif\n}\nin vec4 v_color;\n#if USE_TEXTURE\nin vec2 v_uv0;\nuniform sampler2D texture;\n#endif\n#if USE_OLD_PHOTO\nuniform OldPhoto {\n  float oldLevel;\n};\nvec4 getOldPhotoColor(vec4 color) {\n  float r = 0.393 * color.r + 0.769 * color.g + 0.189 * color.b;\n  float g = 0.349 * color.r + 0.686 * color.g + 0.168 * color.b;\n  float b = 0.272 * color.r + 0.534 * color.g + 0.131 * color.b;\n  return vec4(r, g, b, color.a);\n}\n#endif\nvoid main () {\n  vec4 o = vec4(1, 1, 1, 1);\n  #if USE_TEXTURE\n  o *= texture(texture, v_uv0);\n    #if CC_USE_ALPHA_ATLAS_TEXTURE\n    o.a *= texture2D(texture, v_uv0 + vec2(0, 0.5)).r;\n    #endif\n  #endif\n  o *= v_color;\n  ALPHA_TEST(o);\n  #if USE_OLD_PHOTO\n  vec4 srcColor = o;\n  vec4 oldColor = getOldPhotoColor(srcColor);\n  o = srcColor + (oldColor - srcColor) * oldLevel;\n  #endif\n  gl_FragColor = o;\n}"
+        "frag": "\nprecision highp float;\n#if USE_ALPHA_TEST\n  uniform ALPHA_TEST {\n    float alphaThreshold;\n  };\n#endif\nvoid ALPHA_TEST (in vec4 color) {\n  #if USE_ALPHA_TEST\n      if (color.a < alphaThreshold) discard;\n  #endif\n}\nvoid ALPHA_TEST (in float alpha) {\n  #if USE_ALPHA_TEST\n      if (alpha < alphaThreshold) discard;\n  #endif\n}\nin vec4 v_color;\n#if USE_TEXTURE\nin vec2 v_uv0;\nuniform sampler2D texture;\n#endif\n#if USE_OLD_PHOTO\nuniform OldPhoto {\n  float oldLevel;\n};\nvec4 getOldPhotoColor(vec4 color) {\n  float r = 0.393 * color.r + 0.769 * color.g + 0.189 * color.b;\n  float g = 0.349 * color.r + 0.686 * color.g + 0.168 * color.b;\n  float b = 0.272 * color.r + 0.534 * color.g + 0.131 * color.b;\n  return vec4(r, g, b, color.a);\n}\n#endif\nvoid main () {\n  vec4 o = vec4(1, 1, 1, 1);\n  #if USE_TEXTURE\n  o *= texture(texture, v_uv0);\n    #if CC_USE_ALPHA_ATLAS_TEXTURE\n    o.a *= texture2D(texture, v_uv0 + vec2(0, 0.5)).r;\n    #endif\n  #endif\n  o *= v_color;\n  ALPHA_TEST(o);\n  #if USE_OLD_PHOTO\n  vec4 srcColor = o;\n  vec4 oldColor = getOldPhotoColor(srcColor);\n  o = mix(srcColor, oldColor, oldLevel);\n  #endif\n  gl_FragColor = o;\n}"
       }
     }
   ],