--- a/Theme.wiki	Sun Dec 07 23:56:42 2014 +0000
+++ b/Theme.wiki	Mon Dec 08 00:06:13 2014 +0000
@@ -121,5 +121,12 @@
 
 <code>Values: name, number</code>
 
+=== `ice` ===
+If this key is present (any value), the entire terrain becomes slippery like ice. This also applies to placed girders. This significantly changes the gameplay of your theme, so use wisely.
 
-If this key is present with any value, all c
\ No newline at end of file
+If this key is not present, the terrain is not slippery.
+
+=== `snow` ===
+If this key is present (any value), the flakes which are normally purely decorational now behave like snowflakes. When they collide with terrain, they become a part of the landscape. This significantly changes the gameplay of your theme, so use wisely.
+
+If this key is not present, the flakes are purely decorational.
\ No newline at end of file