diff --git a/resources/Materials/Examples/UsdPreviewSurface/usd_preview_surface_glass.mtlx b/resources/Materials/Examples/UsdPreviewSurface/usd_preview_surface_glass.mtlx
index 5cc6ab552e..3e896ad87b 100644
--- a/resources/Materials/Examples/UsdPreviewSurface/usd_preview_surface_glass.mtlx
+++ b/resources/Materials/Examples/UsdPreviewSurface/usd_preview_surface_glass.mtlx
@@ -5,7 +5,7 @@
     <input name="useSpecularWorkflow" type="integer" value="0" />
     <input name="metallic" type="float" value="0" />
     <input name="roughness" type="float" value="0.01" />
-    <input name="opacity" type="float" value="0" />
+    <input name="opacity" type="float" value="0.001" />
     <input name="opacityThreshold" type="float" value="0" />
     <input name="ior" type="float" value="1.52" />
   </UsdPreviewSurface>