diff --git a/tb-nzp.fgd b/tb-nzp.fgd
index 6774eeb..e8bc163 100644
--- a/tb-nzp.fgd
+++ b/tb-nzp.fgd
@@ -1200,7 +1200,27 @@
 	]
 ]
 
-
+// func_detail
+// Similar in function to the func_detail in Source, though it is still subject to the bsp file format.
+@SolidClass = func_detail : "Detail brushes"
+[
+	// You can leave the detail level to 1. For tiny objects, you might set to 2, so that they won't chop faces of other func_details.
+	zhlt_detaillevel(integer) : "Detail level" : 1
+	// For large shapes such as terrain and walls, set this to no less than their detail level, so that they can chop the faces of adjacent world brushes.
+	zhlt_chopdown(integer) : "Lower its level to chop others" : 0
+	// Usually you don't have to use this.
+	zhlt_chopup(integer) : "Raise its level to get chopped" : 0
+	// For brushes in the same detail level and have overlapping faces (which are on the same plane), this priority determines which one will appear.
+	zhlt_coplanarpriority(integer) : "Priority when faces overlap" : 0
+	// Setting this to 0 will reduce clipnode count, but will lose the benefit of func_detail's better content deciding method which is designed to prevent "Ambiguous leafnode contents" problem.
+	zhlt_clipnodedetaillevel(integer) : "Detail level of cliphulls" : 1
+	// Very useful option which can reduce clipnode count.
+	zhlt_noclip(choices) : "Passable" : "" =
+	[
+		"": "No"
+		1: "Yes"
+	]
+]
 
 @PointClass size(32 32 32) base(Targetname, Target) = func_counter : "Activation Counter"
 [