fixed rendering

ChunkMesh.cs

@@ -1,6 +1,7 @@
 using OpenTK.Graphics.OpenGL4;
 using System;
 using System.Collections.Generic;
+using System.Drawing;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -13,7 +14,7 @@ namespace Voxel
         public int Y;
         private byte[] _packedData;
         public bool NeedsUpdate = false;
-        public int Length = 0;
+        public int Size = 0;
         private List<FaceData> _faces;
 
         public ChunkMesh(int x, int y)
@@ -25,7 +26,7 @@ namespace Voxel
 
         public void SetFaces(List<FaceData> faces)
         {
-            Length = faces.Count;
+            Size = faces.Count;
             _faces = faces;
             NeedsUpdate = true;
         }
@@ -35,7 +36,6 @@ namespace Voxel
             if (NeedsUpdate)
             {
                 _packedData = _faces.SelectMany(f => f.Pack()).ToArray();
-                NeedsUpdate = false;
             }
 
             return _packedData;