abstract public void Express( Vector3[] vertices, ref int verticesCount, List <int[]> indices, ref List <int> indicesCount, Vector3[] normals, ref int normalsCount, Vector2[] uvs, Vector2[] uv2s, Vector2[] uv3s, Vector2[] uv4s, Vector4[] tangents, ref int tangentsCount, ref FractalRenderState state );
abstract public void Express( World world, ref FractalRenderState state );