diff --git a/packages/custom-material/src/advanced-shader/sss/SSSFunction.glsl b/packages/custom-material/src/advanced-shader/sss/SSSFunction.glsl
index 05868ed8..1345c911 100644
--- a/packages/custom-material/src/advanced-shader/sss/SSSFunction.glsl
+++ b/packages/custom-material/src/advanced-shader/sss/SSSFunction.glsl
@@ -41,14 +41,14 @@ if (all(lessThanEqual(abs(x0), x1)))
  return scale * y + bias;
 }
 
-// Normalized SG
+// Normalized sg
 FsphericalGaussian makeNormalizedSG(vec3 lightdir , vec3 sharpness)
 {
-FsphericalGaussian SG;
-SG.Axis = lightdir;
-SG.Sharpness = sharpness;
-SG.Amplitude = SG.Sharpness /((2.0 * PI) * (1.0 - exp(-2.0 * SG.Sharpness)));
-return SG;
+FsphericalGaussian sg;
+sg.Axis = lightdir;
+sg.Sharpness = sharpness;
+sg.Amplitude = sg.Sharpness /((2.0 * PI) * (1.0 - exp(-2.0 * sg.Sharpness)));
+return sg;
 }
   
 vec3 sgdiffuseLighting(vec3 light ,vec3 normal ,vec3 scatterAmt)
diff --git a/packages/custom-material/src/advanced-shader/sss/SSSLightDirect.glsl b/packages/custom-material/src/advanced-shader/sss/SSSLightDirect.glsl
index 76f2ea4d..a34f9bf8 100644
--- a/packages/custom-material/src/advanced-shader/sss/SSSLightDirect.glsl
+++ b/packages/custom-material/src/advanced-shader/sss/SSSLightDirect.glsl
@@ -17,8 +17,8 @@ void surfaceShadingSSS(Varyings varyings, SurfaceData surfaceData, BRDFData brdf
 
     float skintexture = skinCurvatureTexture.r * material_CurvaturePower ;
     vec3 scatterAmt = material_SkinScatterAmount.rgb * skintexture;
-    vec3 SG = sgdiffuseLighting(incidentDirection, surfaceData.normal, scatterAmt);
-    vec3 irradiance = SG * lightColor * PI;
+    vec3 sg = sgdiffuseLighting(incidentDirection, surfaceData.normal, scatterAmt);
+    vec3 irradiance = sg * lightColor * PI;
 
     // ClearCoat Lobe
     float attenuation = clearCoatLobe(varyings, surfaceData, brdfData, incidentDirection, lightColor, specularColor);