diff --git a/libraries/render-utils/src/ssao.slh b/libraries/render-utils/src/ssao.slh
index d34d92276b..17ac229805 100644
--- a/libraries/render-utils/src/ssao.slh
+++ b/libraries/render-utils/src/ssao.slh
@@ -243,6 +243,32 @@ vec4 fetchTap(ivec4 side, vec2 tapSidePixelPos, float tapRadius, vec2 sideImageS
    return P;
 }
 
+vec3 buildPosition(ivec4 side, vec2 fragUVPos, ivec2 depthTexFragPixelPos, ivec2 deltaDepthTexPixel, vec2 uvScale) {
+    depthTexFragPixelPos += deltaDepthTexPixel;
+    fragUVPos += deltaDepthTexPixel * uvScale;
+    float Zeye = getZEyeAtPixel(depthTexFragPixelPos, 0);
+    return evalEyePositionFromZeye(side.x, Zeye, fragUVPos);
+}
+
+vec3 getMinDiff(vec3 centralPoint, vec3 offsetPoint0, vec3 offsetPoint1) {
+    vec3 delta0 = offsetPoint0 - centralPoint;
+    vec3 delta1 = centralPoint - offsetPoint1;
+    return dot(delta0, delta0) < dot(delta1, delta1) ? delta0 : delta1;
+}
+
+vec3 buildNormal(ivec4 side, vec2 fragUVPos, ivec2 depthTexFragPixelPos, vec3 fragPositionES, ivec2 depthTextureScale, vec2 sideImageSize) {
+    vec2 uvScale = vec2(1.0) / (sideImageSize * depthTextureScale);
+    vec3 fragPositionDxPos = buildPosition(side, fragUVPos, depthTexFragPixelPos, ivec2(1,0), uvScale);
+    vec3 fragPositionDxNeg = buildPosition(side, fragUVPos, depthTexFragPixelPos, ivec2(-1,0), uvScale);
+    vec3 fragPositionDyPos = buildPosition(side, fragUVPos, depthTexFragPixelPos, ivec2(0,1), uvScale);
+    vec3 fragPositionDyNeg = buildPosition(side, fragUVPos, depthTexFragPixelPos, ivec2(0,-1), uvScale);
+
+    vec3 fragPositionDx = getMinDiff(fragPositionES, fragPositionDxPos, fragPositionDxNeg);
+    vec3 fragPositionDy = getMinDiff(fragPositionES, fragPositionDyPos, fragPositionDyNeg);
+
+    return normalize( cross(fragPositionDx, fragPositionDy) );
+}
+
 <@endfunc@>
 
 
diff --git a/libraries/render-utils/src/ssao_buildNormals.slf b/libraries/render-utils/src/ssao_buildNormals.slf
index 8e06d4ffc9..f21a529807 100644
--- a/libraries/render-utils/src/ssao_buildNormals.slf
+++ b/libraries/render-utils/src/ssao_buildNormals.slf
@@ -26,7 +26,8 @@ void main(void) {
     ivec2 fragPixelPos = ivec2(fragCoord.xy);
 
     // Fetch the z under the pixel (stereo or not)
-    ivec2 depthTexFragPixelPos = fragPixelPos * getDepthTextureSize(0) / renderSize ;
+    ivec2 depthTextureScale = getDepthTextureSize(0) / renderSize;
+    ivec2 depthTexFragPixelPos = fragPixelPos * depthTextureScale;
     float Zeye = getZEyeAtPixel(depthTexFragPixelPos, 0);
 
     // Stereo side info
@@ -38,7 +39,7 @@ void main(void) {
 
     // The position and normal of the pixel fragment in Eye space
     vec3 fragPositionES = evalEyePositionFromZeye(side.x, Zeye, fragUVPos);
-    vec3 fragNormalES = evalEyeNormal(fragPositionES);
+    vec3 fragNormalES = buildNormal(side, fragUVPos, depthTexFragPixelPos, fragPositionES, depthTextureScale, sideImageSize);
     vec3 absFragNormalES = abs(fragNormalES);
     
     outFragColor = vec4(vec3(fragNormalES)*0.5 + vec3(0.5), 1.0);
diff --git a/libraries/render-utils/src/ssao_makeOcclusion.slf b/libraries/render-utils/src/ssao_makeOcclusion.slf
index 3db497fdc7..cee5ef6fe3 100644
--- a/libraries/render-utils/src/ssao_makeOcclusion.slf
+++ b/libraries/render-utils/src/ssao_makeOcclusion.slf
@@ -36,7 +36,8 @@ void main(void) {
 #endif
 
     // Fetch the z under the pixel (stereo or not)
-    ivec2 depthTexFragPixelPos = fragPixelPos * getDepthTextureSize(0) / renderSize ;
+    ivec2 depthTextureScale = getDepthTextureSize(0) / renderSize;
+    ivec2 depthTexFragPixelPos = fragPixelPos * depthTextureScale;
     float Zeye = getZEyeAtPixel(depthTexFragPixelPos, 0);
 #if SSAO_USE_QUAD_SPLIT
     vec3 fragNormalES = getNormalEyeAtPixel(fragPixelPos, 0);
@@ -52,7 +53,7 @@ void main(void) {
     // The position and normal of the pixel fragment in Eye space
     vec3 fragPositionES = evalEyePositionFromZeye(side.x, Zeye, fragUVPos);
 #if !SSAO_USE_QUAD_SPLIT
-    vec3 fragNormalES = evalEyeNormal(fragPositionES);
+    vec3 fragNormalES = buildNormal(side, fragUVPos, depthTexFragPixelPos, fragPositionES, depthTextureScale, sideImageSize);
 #endif
 
     // Choose the screen-space sample radius