diff --git a/Shader-Changes.md b/Shader-Changes.md
index df9edd2..17d4391 100644
--- a/Shader-Changes.md
+++ b/Shader-Changes.md
@@ -74,10 +74,19 @@ Shader changes created specifically for Mapbase, mostly by Blixibon.
 ### $blendmodulatetexture fixes
 Mapbase fixes $blendmodulatetexture not appearing under a flashlight, not working with transforms, and lets it show up in Hammer. It also uses Alien Swarm's version of the shader code.
 
+[You can find the VDC article here.](https://developer.valvesoftware.com/wiki/$blendmodulatetexture)
+
 ---
 ### $phongdisablehalflambert
-Mapbase ports this parameter from Alien Swarm, which allows $phong to be used without $halflambert.
+Mapbase ports this parameter from Alien Swarm, which allows $phong to be used without $halflambert being forced enabled.
+
+[You can find the VDC article for $phong here](https://developer.valvesoftware.com/wiki/$phong), which lists $phongdisablehalflambert.
 
 ---
 ### $basetexturetransform2 on WorldVertexTransition in DX9
-Mapbase adds $basetexturetransform2 to the DX9 version of the shader. It doesn't work with $seamless_scale or the new $phong.
\ No newline at end of file
+Mapbase adds $basetexturetransform2 to the DX9 version of the shader.
+
+$basetexturetransform2 already existed on the 
+
+It doesn't work with $seamless_scale or the C17:EP1 brush phong.
+