diff --git a/images/layer_graph.png b/images/layer_graph.png
index f8c75c7..b917607 100644
Binary files a/images/layer_graph.png and b/images/layer_graph.png differ
diff --git a/images/layer_graph.svg b/images/layer_graph.svg
index d757509..40f9fa2 100644
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diff --git a/index.html b/index.html
index cffd504..acca787 100644
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 where $r_\mathrm{B}=$ **`specular_roughness`** and $r_\mathrm{C}=$ **`coat_roughness`**.
 
 
+
 ### Darkening
 
 Figure [coat_darkening_grid] shows the physically-correct change in appearance (at normal incidence) of a textured diffuse base with a wood texture and smooth clear-coat as the IOR of the clear-coat is varied, exhibiting darkening of the base -- due to the internal reflections in the coat -- which increases as IOR increases.