diff --git a/Directional-blocks-and-auto-rotate.md b/Directional-blocks-and-auto-rotate.md
index 67c2a9f..2f96b70 100644
--- a/Directional-blocks-and-auto-rotate.md
+++ b/Directional-blocks-and-auto-rotate.md
@@ -50,4 +50,8 @@ These suffixes stand for Down and Up.
 
 These suffixes stand for North/South, West/East and Up/Down
 
-![NS/WE/UD](https://cdn.discordapp.com/attachments/293663784290222080/395164320524271618/unknown.png)
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+![NS/WE/UD](https://cdn.discordapp.com/attachments/293663784290222080/395164320524271618/unknown.png)
+
+Note that if you do not include a "-UD" variant, auto-rotate will determine which block to place based on the direction you're looking when you place it. This makes it useful for fence or centered wall type blocks:
+
+![NS/WE](https://cdn.discordapp.com/attachments/293663784290222080/395165480475951105/unknown.png)
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