diff --git a/Gems/Atom/Tools/MaterialEditor/Assets/MaterialEditor/ViewportModels/QuadSphere_Default.material b/Gems/Atom/Tools/MaterialEditor/Assets/MaterialEditor/ViewportModels/QuadSphere_Default.material
deleted file mode 100644
index 4905c302fe..0000000000
--- a/Gems/Atom/Tools/MaterialEditor/Assets/MaterialEditor/ViewportModels/QuadSphere_Default.material
+++ /dev/null
@@ -1,28 +0,0 @@
-{
-    "description": "",
-    "materialType": "Materials/Types/StandardPBR.materialtype",
-    "parentMaterial": "",
-    "propertyLayoutVersion": 3,
-    "properties": {
-        "baseColor": {
-            "color": [
-                0.800000011920929,
-                0.800000011920929,
-                0.800000011920929,
-                1.0
-            ],
-            "textureMap": "MaterialEditor/ViewportModels/_dev_shaderball_00_basecolor.png"
-        },
-        "emissive": {
-            "color": [
-                0.0,
-                0.0,
-                0.0,
-                1.0
-            ]
-        },
-        "opacity": {
-            "factor": 1.0
-        }
-    }
-}
\ No newline at end of file