diff --git a/src/DotRecast.Detour.TileCache/DtTileCacheBuilder.cs b/src/DotRecast.Detour.TileCache/DtTileCacheBuilder.cs
index db92e20..6240854 100644
--- a/src/DotRecast.Detour.TileCache/DtTileCacheBuilder.cs
+++ b/src/DotRecast.Detour.TileCache/DtTileCacheBuilder.cs
@@ -24,7 +24,7 @@ using System.IO;
 using DotRecast.Core;
 using DotRecast.Core.Numerics;
 using DotRecast.Detour.TileCache.Io;
-using DotRecast.Detour.TileCache.Io.Compress;
+using DotRecast.Recast;
 
 
 namespace DotRecast.Detour.TileCache
@@ -46,10 +46,10 @@ namespace DotRecast.Detour.TileCache
 
             Array.Fill(layer.regs, (short)0x00FF);
             int nsweeps = w;
-            DtLayerSweepSpan[] sweeps = new DtLayerSweepSpan[nsweeps];
+            RcLayerSweepSpan[] sweeps = new RcLayerSweepSpan[nsweeps];
             for (int i = 0; i < sweeps.Length; i++)
             {
-                sweeps[i] = new DtLayerSweepSpan();
+                sweeps[i] = new RcLayerSweepSpan();
             }
 
             // Partition walkable area into monotone regions.
diff --git a/src/DotRecast.Recast/RcLayerRegion.cs b/src/DotRecast.Recast/RcLayerRegion.cs
index 7de3803..7c94007 100644
--- a/src/DotRecast.Recast/RcLayerRegion.cs
+++ b/src/DotRecast.Recast/RcLayerRegion.cs
@@ -5,11 +5,11 @@ namespace DotRecast.Recast
     public class RcLayerRegion
     {
         public int id;
-        public int layerId;
-        public bool @base;
+        public int layerId; // Layer ID
+        public bool @base; // Flag indicating if the region is the base of merged regions.
         public int ymin, ymax;
-        public List<int> layers;
-        public List<int> neis;
+        public List<int> layers; // Layer count
+        public List<int> neis; // Neighbour count
 
         public RcLayerRegion(int i)
         {
diff --git a/src/DotRecast.Detour.TileCache/DtLayerSweepSpan.cs b/src/DotRecast.Recast/RcLayerSweepSpan.cs
similarity index 63%
rename from src/DotRecast.Detour.TileCache/DtLayerSweepSpan.cs
rename to src/DotRecast.Recast/RcLayerSweepSpan.cs
index c14167b..f0c2a7d 100644
--- a/src/DotRecast.Detour.TileCache/DtLayerSweepSpan.cs
+++ b/src/DotRecast.Recast/RcLayerSweepSpan.cs
@@ -1,6 +1,6 @@
-namespace DotRecast.Detour.TileCache
+namespace DotRecast.Recast
 {
-    public class DtLayerSweepSpan
+    public class RcLayerSweepSpan
     {
         public int ns; // number samples
         public int id; // region id
diff --git a/src/DotRecast.Recast/RcLayers.cs b/src/DotRecast.Recast/RcLayers.cs
index 7b347a9..b09c9b4 100644
--- a/src/DotRecast.Recast/RcLayers.cs
+++ b/src/DotRecast.Recast/RcLayers.cs
@@ -62,10 +62,10 @@ namespace DotRecast.Recast
             int[] srcReg = new int[chf.spanCount];
             Array.Fill(srcReg, 0xFF);
             int nsweeps = chf.width; // Math.Max(chf.width, chf.height);
-            RcSweepSpan[] sweeps = new RcSweepSpan[nsweeps];
+            RcLayerSweepSpan[] sweeps = new RcLayerSweepSpan[nsweeps];
             for (int i = 0; i < sweeps.Length; i++)
             {
-                sweeps[i] = new RcSweepSpan();
+                sweeps[i] = new RcLayerSweepSpan();
             }
 
             // Partition walkable area into monotone regions.
@@ -269,11 +269,11 @@ namespace DotRecast.Recast
                         // Skip already visited.
                         if (regn.layerId != 0xff)
                             continue;
-                        
+
                         // Skip if the neighbour is overlapping root region.
                         if (Contains(root.layers, nei))
                             continue;
-                        
+
                         // Skip if the height range would become too large.
                         int ymin = Math.Min(root.ymin, regn.ymin);
                         int ymax = Math.Max(root.ymax, regn.ymax);