diff --git a/Obj2Tiles.Library/Common.cs b/Obj2Tiles.Library/Common.cs
index f458779..33bd5a6 100644
--- a/Obj2Tiles.Library/Common.cs
+++ b/Obj2Tiles.Library/Common.cs
@@ -12,17 +12,30 @@ public static class Common
     public static void CopyImage(Image<Rgba32> sourceImage, Image<Rgba32> dest, int sourceX, int sourceY, int sourceWidth, int sourceHeight, int destX, int destY)
     {
         var height = sourceHeight;
-        
+
         sourceImage.ProcessPixelRows(dest, (sourceAccessor, targetAccessor) =>
         {
+            var shouldCulaSourceAccessorIndex = sourceY + height > sourceAccessor.Height;
+
             for (var i = 0; i < height; i++)
             {
-                var sourceRow = sourceAccessor.GetRowSpan(sourceY + i);
+                var sourceAccessorIndex = sourceY + i;
+                if (shouldCulaSourceAccessorIndex && sourceAccessorIndex >= sourceAccessor.Height)
+                {
+                    sourceAccessorIndex %= sourceAccessor.Height;
+                }
+                var sourceRow = sourceAccessor.GetRowSpan(sourceAccessorIndex);
                 var targetRow = targetAccessor.GetRowSpan(i + destY);
 
+                var shouldCulaSourceRowIndex = sourceX + sourceWidth > sourceRow.Length;
                 for (var x = 0; x < sourceWidth; x++)
                 {
-                    targetRow[x + destX] = sourceRow[x + sourceX];
+                    var sourceRowIndex = x + sourceX;
+                    if (shouldCulaSourceRowIndex && sourceRowIndex >= sourceRow.Length)
+                    {
+                        sourceRowIndex %= sourceRow.Length;
+                    }
+                    targetRow[x + destX] = sourceRow[sourceRowIndex];// 
                 }
             }
         });
diff --git a/Obj2Tiles.Library/Geometry/MeshT.cs b/Obj2Tiles.Library/Geometry/MeshT.cs
index cf5dd62..773367d 100644
--- a/Obj2Tiles.Library/Geometry/MeshT.cs
+++ b/Obj2Tiles.Library/Geometry/MeshT.cs
@@ -551,9 +551,12 @@ private void BinPackTextures(string targetFolder, int materialIndex, IReadOnlyLi
             Debug.WriteLine("Found place for cluster at " + newTextureClusterRect);
 
             // Too long to explain this here, but it works
-            var adjustedSourceY = !(material.Texture == null) 
-            ? Math.Max(texture.Height - (clusterY + clusterHeight), 0) 
-            : Math.Max(normalMap.Height - (clusterY + clusterHeight), 0);
+            var height = material.Texture != null ? texture.Height : normalMap.Height;
+            var adjustedSourceY = height - (clusterY + clusterHeight);
+            if (adjustedSourceY < 0)
+            {
+                adjustedSourceY = (int)Math.Ceiling((double)(clusterY + clusterHeight) / (double)height) * height - (clusterY + clusterHeight);
+            }
             var adjustedDestY = Math.Max(edgeLength - (newTextureClusterRect.Y + clusterHeight), 0);
 
             if (!(material.Texture == null))
diff --git a/Obj2Tiles.Library/Geometry/MeshUtils.cs b/Obj2Tiles.Library/Geometry/MeshUtils.cs
index b697fc8..272c206 100644
--- a/Obj2Tiles.Library/Geometry/MeshUtils.cs
+++ b/Obj2Tiles.Library/Geometry/MeshUtils.cs
@@ -50,7 +50,7 @@ public static IMesh LoadMesh(string fileName, out string[] dependencies)
                         double.Parse(segs[1], CultureInfo.InvariantCulture),
                         double.Parse(segs[2], CultureInfo.InvariantCulture));
                     
-                    if (vtx.X < 0 || vtx.Y < 0 || vtx.X > 1 || vtx.Y > 1)
+                    if (vtx.X < 0 || vtx.Y < 0)
                         throw new Exception("Invalid texture coordinates: " + vtx);
                     
                     textureVertices.Add(vtx);