itsmikita

        CATransform3D transformation = CATransform3DIdentity;
        // x line
        transformation.m11 = 1; // 20% less wide wall
        transformation.m12 = 0; //-1 / 10.0; // skews left up, right down if >0
        transformation.m13 = 0; // extends sideways for a short time
        transformation.m14 = 0;// // 1 / 5000 = left side towards viewer, right side away from viewer
        // y line
        transformation.m21 = 0; //-1 / 2.0; // skews bottom left, top right if <0
        transformation.m22 = 1; // .8 - 20% less tall
        transformation.m23 = 0; // extends upward for a short time