diff --git a/addons/material_maker/nodes/material.mmg b/addons/material_maker/nodes/material.mmg
index 3a046c6ad..2e8aa23e8 100644
--- a/addons/material_maker/nodes/material.mmg
+++ b/addons/material_maker/nodes/material.mmg
@@ -2797,11 +2797,11 @@
 							"    - _Glossiness: 0",
 							"    - _GlossyReflections: 0",
 							"    - _Metallic: 0",
-							"    - _OcclusionStrength: 1",
+							"    - _OcclusionStrength: $(param:ao)",
 							"    - _Parallax: $(expr:0.005+(0.08-0.005)*$(param:depth_scale))",
 							"    - _QueueOffset: 0",
 							"    - _ReceiveShadows: 1",
-							"    - _Smoothness: 0.5",
+							"    - _Smoothness: $(expr:1.0-$(param:roughness))",
 							"    - _SmoothnessTextureChannel: 0",
 							"    - _SpecularHighlights: 1",
 							"    - _SrcBlend: 1",