MyGame.Terrain.Draw C# (CSharp) Method

        public void Draw()
        {
            Game.GraphicsDevice.SetVertexBuffer(vertexBuffer);
            Game.GraphicsDevice.Indices = indexBuffer;

            effect.Parameters["View"].SetValue(camera.View);
            effect.Parameters["Projection"].SetValue(camera.Projection);
            effect.Parameters["TextureTiling"].SetValue(textureTiling);
            effect.Parameters["LightDirection"].SetValue(lightDirection);
            effect.Parameters["BaseTexture"].SetValue(baseTexture);

            effect.Parameters["RTexture"].SetValue(RTexture);
            effect.Parameters["GTexture"].SetValue(GTexture);
            effect.Parameters["BTexture"].SetValue(BTexture);
            effect.Parameters["WeightMap"].SetValue(WeightMap);

            effect.Parameters["DetailTexture"].SetValue(DetailTexture);
            effect.Parameters["DetailDistance"].SetValue(DetailDistance);
            effect.Parameters["DetailTextureTiling"].SetValue(DetailTextureTiling);

            effect.Techniques[0].Passes[0].Apply();

            Game.GraphicsDevice.DrawIndexedPrimitives(PrimitiveType.TriangleList, 0, 0,
                nVertices, 0, nIndices / 3);
        }

        // Called when the game should draw itself
        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.Black);
            water.PreDraw(camera, gameTime);

            GraphicsDevice.Clear(Color.Black);

            sky.Draw(camera.View, camera.Projection, ((FreeCamera)camera).Position);

            foreach (CModel model in models)
            {
                if (camera.BoundingVolumeIsInView(model.BoundingSphere))
                {
                    model.Draw(camera.View, camera.Projection, ((FreeCamera)camera).Position);
                }
            }

            terrain.Draw(camera.View, camera.Projection, ((FreeCamera)camera).Position);

            water.Draw(camera.View, camera.Projection, ((FreeCamera)camera).Position);

            trees.Draw(camera.View, camera.Projection, ((FreeCamera)camera).Up,
                       ((FreeCamera)camera).Right);

            grass.Draw(camera.View, camera.Projection, ((FreeCamera)camera).Up,
                       ((FreeCamera)camera).Right);

            clouds.Draw(camera.View, camera.Projection, ((FreeCamera)camera).Up,
                        ((FreeCamera)camera).Right);

            base.Draw(gameTime);
        }