diff --git a/Changes.md b/Changes.md
index 0b2943c5b2..5d179bf0b9 100644
--- a/Changes.md
+++ b/Changes.md
@@ -5,6 +5,7 @@ Improvements
 ------------
 
 - SetExpressions : Set Expressions containing only whitespace characters are now treated as empty rather than producing an error.
+- ArnoldShader : Moved Arnold 7.3.3.0's new `standard_volume.scatter_diffusion` parameters to a "Scatter Diffusion" section of the UI.
 
 Fixes
 -----
diff --git a/arnoldPlugins/gaffer.mtd b/arnoldPlugins/gaffer.mtd
index 9666716b3c..3928c9b68a 100644
--- a/arnoldPlugins/gaffer.mtd
+++ b/arnoldPlugins/gaffer.mtd
@@ -2684,26 +2684,59 @@
 	[attr density]
 		gaffer.graphEditorLayout.visible BOOL true
 		page STRING "Density"
+		gaffer.layout.index INT 0
 	[attr density_channel]
 		page STRING "Density"
+		gaffer.layout.index INT 1
 
 	[attr scatter]
 		gaffer.graphEditorLayout.visible BOOL true
 		page STRING "Scatter"
+		gaffer.layout.index INT 2
 	[attr scatter_color]
 		gaffer.graphEditorLayout.visible BOOL true
 		page STRING "Scatter"
+		gaffer.layout.index INT 3
 	[attr scatter_color_channel]
 		page STRING "Scatter"
+		gaffer.layout.index INT 4
 	[attr scatter_anisotropy]
 		page STRING "Scatter"
+		gaffer.layout.index INT 5
 	[attr scatter_secondary_anisotropy]
 		page STRING "Scatter"
 		label STRING "Secondary Anisotropy"
 		gaffer.layout.activator STRING "secondaryAnisotropyEnabled"
+		gaffer.layout.index INT 6
 	[attr scatter_secondary_anisotropy_mix]
 		page STRING "Scatter"
 		label STRING "Secondary Anisotropy Mix"
+		gaffer.layout.index INT 7
+
+	[attr scatter_diffusion]
+		page STRING "Scatter Diffusion"
+		label STRING "Diffusion"
+		gaffer.layout.index INT 8
+	[attr scatter_diffusion_bias]
+		page STRING "Scatter Diffusion"
+		label STRING "Diffusion Bias"
+		gaffer.layout.index INT 9
+	[attr scatter_diffusion_gain]
+		page STRING "Scatter Diffusion"
+		label STRING "Diffusion Gain"
+		gaffer.layout.index INT 10
+	[attr scatter_diffusion_roughness]
+		page STRING "Scatter Diffusion"
+		label STRING "Diffusion Roughness"
+		gaffer.layout.index INT 11
+	[attr scatter_diffusion_roughness_bias]
+		page STRING "Scatter Diffusion"
+		label STRING "Diffusion Roughness Bias"
+		gaffer.layout.index INT 12
+	[attr scatter_diffusion_roughness_gain]
+		page STRING "Scatter Diffusion"
+		label STRING "Diffusion Roughness Gain"
+		gaffer.layout.index INT 13
 
 	[attr transparent]
 		page STRING "Transparent"