for (int y = starty; y < endy; ++y)
            {
                for (int x = startx; x < endx; ++x)
                {
                    terrainVertices[x + y * terrainWidth].VertexColor = farbe;
                }
            }
            //vertexDec = new VertexDeclaration(device, HeightMap.VertexMultitextured.VertexElements);
            terrainVertexBuffer.SetData(terrainVertices);