diff --git a/Graphical-Changes.md b/Graphical-Changes.md
index ed2fc8f..2baf12d 100644
--- a/Graphical-Changes.md
+++ b/Graphical-Changes.md
@@ -42,6 +42,12 @@ Fun fact: This was originally implemented by accident.
 
 Todo: up-to-date image, maybe unique article for both "Shader changes" and this to link to (or even merge this and shader changes)
 
-"Brush phong" is phong reflections on brush shaders, like `LightmappedGeneric` (or in this case `SDK_LightmappedGeneric)`. It reflects the flashlight beautifully and supports exponent masking.
+"Brush phong" is phong reflections on brush shaders, like `SDK_LightmappedGeneric`. It reflects the flashlight beautifully and supports exponent masking.
 
-<strong style="margin-left:1em; color:#D31B1B; white-space:nowrap;"><img src="https://developer.valvesoftware.com/w/images/c/cb/Warning.png"/> Warning:&nbsp;</strong> Brush phong requires materials to use custom shaders. See [Shader changes](Shader-changes) for more information.
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+<strong style="margin-left:1em; color:#D31B1B; white-space:nowrap;"><img src="https://developer.valvesoftware.com/w/images/c/cb/Warning.png"/> Warning:&nbsp;</strong> Brush phong requires materials to use custom shaders. See [Shader changes](Shader-changes) for more information.
+
+### Tree sway
+---
+Mapbase adds support for `$treeSway`, based on HL2: Downfall's implementation from the Alien Swarm SDK. It allows trees to "sway" with the wind. Some existing tree models have been given additional skins which use `$treeSway`.
+
+<strong style="margin-left:1em; color:#D31B1B; white-space:nowrap;"><img src="https://developer.valvesoftware.com/w/images/c/cb/Warning.png"/> Warning:&nbsp;</strong> Tree sway requires materials to use custom shaders. See [Shader changes](Shader-changes) for more information.
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