diff --git a/Scripts/Core/CSG/Edge.cs b/Scripts/Core/CSG/Edge.cs
index 2abe5680..a3610e2f 100644
--- a/Scripts/Core/CSG/Edge.cs
+++ b/Scripts/Core/CSG/Edge.cs
@@ -72,9 +72,10 @@ public Vector3 CenterPoint
         /// </exception>
         public Edge(Vertex vertex1, Vertex vertex2)
         {
+#if SABRE_CSG_DEBUG
             if (vertex1 == null) throw new ArgumentNullException("vertex1");
             if (vertex2 == null) throw new ArgumentNullException("vertex2");
-
+#endif
             this.vertex1 = vertex1;
             this.vertex2 = vertex2;
         }
@@ -93,8 +94,9 @@ public Edge(Vertex vertex1, Vertex vertex2)
         /// </exception>
         public bool Matches(Edge other)
         {
+#if SABRE_CSG_DEBUG
             if (other == null) throw new ArgumentNullException("other");
-
+#endif
             // check whether we approximately match the other edge:
             if (vertex1.Position.EqualsWithEpsilon(other.vertex1.Position)
                 && vertex2.Position.EqualsWithEpsilon(other.Vertex2.Position))
@@ -121,8 +123,9 @@ public bool Matches(Edge other)
         /// </exception>
         public bool Parallel(Edge other)
         {
+#if SABRE_CSG_DEBUG
             if (other == null) throw new ArgumentNullException("other");
-
+#endif
             Vector3 direction1 = vertex2.Position - vertex1.Position;
             Vector3 direction2 = other.Vertex2.Position - other.Vertex1.Position;
 
@@ -145,8 +148,9 @@ public bool Parallel(Edge other)
         /// </exception>
         public bool Intersects(Edge other)
         {
+#if SABRE_CSG_DEBUG
             if (other == null) throw new ArgumentNullException("other");
-
+#endif
             // early out: if the edges aren't parallel to each other, they can't be collinear.
             if (!Parallel(other))
                 return false;
@@ -208,8 +212,9 @@ public bool Intersects(Edge other)
         /// </exception>
         public bool Collinear(Edge other)
         {
+#if SABRE_CSG_DEBUG
             if (other == null) throw new ArgumentNullException("other");
-
+#endif
             return EdgeUtility.EdgeMatches(this, other);
         }
 
diff --git a/Scripts/Core/CSG/Vertex.cs b/Scripts/Core/CSG/Vertex.cs
index 9d845352..3f677737 100644
--- a/Scripts/Core/CSG/Vertex.cs
+++ b/Scripts/Core/CSG/Vertex.cs
@@ -96,9 +96,10 @@ public void FlipNormal()
         /// </exception>
         public static Vertex Lerp(Vertex a, Vertex b, float t)
         {
+#if SABRE_CSG_DEBUG
             if (a == null) throw new ArgumentNullException("a");
             if (b == null) throw new ArgumentNullException("b");
-
+#endif
             return new Vertex()
             {
                 Position = Vector3.Lerp(a.Position, b.Position, t),
diff --git a/Scripts/UI/SabreCSGPreferences.cs b/Scripts/UI/SabreCSGPreferences.cs
index 8631c106..d17f6764 100644
--- a/Scripts/UI/SabreCSGPreferences.cs
+++ b/Scripts/UI/SabreCSGPreferences.cs
@@ -12,7 +12,8 @@ namespace Sabresaurus.SabreCSG
     public class SabreCSGPreferences : EditorWindow
     {
         private const string RUNTIME_CSG_DEFINE = "RUNTIME_CSG";
-        private static readonly Vector2 WINDOW_SIZE = new Vector2(370, 360);
+        private const string SABRE_CSG_DEBUG_DEFINE = "SABRE_CSG_DEBUG";
+        private static readonly Vector2 WINDOW_SIZE = new Vector2(370, 400);
 
         //private static Event cachedEvent;
 
@@ -151,6 +152,34 @@ public static void PreferencesGUI()
                 }
             }
 
+            GUILayout.Space(20);
+            GUILayout.Label("Debug mode executes additional code for verbose error checking. Used by SabreCSG developers.", style);
+            buildTargetGroup = EditorUserBuildSettings.selectedBuildTargetGroup;
+            defines = PlayerSettings.GetScriptingDefineSymbolsForGroup(buildTargetGroup);
+            definesSplit = defines.Split(';').ToList();
+            enabled = definesSplit.Contains(SABRE_CSG_DEBUG_DEFINE);
+            if (enabled)
+            {
+                if (GUILayout.Button("Disable Debug Mode (Recommended)"))
+                {
+                    definesSplit.Remove(SABRE_CSG_DEBUG_DEFINE);
+                    defines = string.Join(";", definesSplit.ToArray());
+                    PlayerSettings.SetScriptingDefineSymbolsForGroup(buildTargetGroup, defines);
+                }
+            }
+            else
+            {
+                if (GUILayout.Button("Enable Debug Mode (Not Recommended)"))
+                {
+                    if (!definesSplit.Contains(SABRE_CSG_DEBUG_DEFINE))
+                    {
+                        definesSplit.Add(SABRE_CSG_DEBUG_DEFINE);
+                    }
+                    defines = string.Join(";", definesSplit.ToArray());
+                    PlayerSettings.SetScriptingDefineSymbolsForGroup(buildTargetGroup, defines);
+                }
+            }
+
             GUILayout.FlexibleSpace();
 
             GUILayout.Label("SabreCSG Version " + CSGModel.VERSION_STRING, SabreGUILayout.GetForeStyle());