diff --git a/src/mesh/Rope.js b/src/mesh/Rope.js
index 08e4d00..d713ec1 100644
--- a/src/mesh/Rope.js
+++ b/src/mesh/Rope.js
@@ -77,6 +77,15 @@
             return;
         }
 
+        // if the number of points has changed we will need to recreate the arraybuffers
+        if (this.vertices.length / 4 !== points.length)
+        {
+            this.vertices = new Float32Array(points.length * 4);
+            this.uvs = new Float32Array(points.length * 4);
+            this.colors = new Float32Array(points.length * 2);
+            this.indices = new Uint16Array(points.length * 2);
+        }
+
         const uvs = this.uvs;
 
         const indices = this.indices;
@@ -120,8 +129,9 @@
             indices[index + 1] = index + 1;
         }
 
-        this.dirty = true;
-        this.indexDirty = true;
+        // ensure that the changes are uploaded
+        this.dirty++;
+        this.indexDirty++;
     }
 
     /**

diff --git a/src/mesh/Rope.js b/src/mesh/Rope.js
index 08e4d00..d713ec1 100644
--- a/src/mesh/Rope.js
+++ b/src/mesh/Rope.js
@@ -77,6 +77,15 @@
             return;
         }
 
+        // if the number of points has changed we will need to recreate the arraybuffers
+        if (this.vertices.length / 4 !== points.length)
+        {
+            this.vertices = new Float32Array(points.length * 4);
+            this.uvs = new Float32Array(points.length * 4);
+            this.colors = new Float32Array(points.length * 2);
+            this.indices = new Uint16Array(points.length * 2);
+        }
+
         const uvs = this.uvs;
 
         const indices = this.indices;
@@ -120,8 +129,9 @@
             indices[index + 1] = index + 1;
         }
 
-        this.dirty = true;
-        this.indexDirty = true;
+        // ensure that the changes are uploaded
+        this.dirty++;
+        this.indexDirty++;
     }
 
     /**
diff --git a/src/mesh/webgl/MeshRenderer.js b/src/mesh/webgl/MeshRenderer.js
index 73d78e6..d2625d4 100644
--- a/src/mesh/webgl/MeshRenderer.js
+++ b/src/mesh/webgl/MeshRenderer.js
@@ -77,17 +77,19 @@
 
         if (mesh.dirty !== glData.dirty)
         {
+
             glData.dirty = mesh.dirty;
-            glData.uvBuffer.upload();
+            glData.uvBuffer.upload(mesh.uvs);
         }
 
         if (mesh.indexDirty !== glData.indexDirty)
         {
             glData.indexDirty = mesh.indexDirty;
-            glData.indexBuffer.upload();
+            glData.indexBuffer.upload(mesh.indices);
         }
 
-        glData.vertexBuffer.upload();
+
+        glData.vertexBuffer.upload(mesh.vertices);
 
         renderer.bindShader(glData.shader);
         renderer.bindTexture(texture, 0);