Comparison of 3D model simulations and corresponding observed HST images of Hen 2-73 and Hen 2-96. Left row: 3D mesh models of Hen 2-73 and Hen 2-96. Note that the ionised torus elements in central regions of two YPNe are not constructed in the models. Middle row: the corresponding renderings of mesh model constructs. A Gaussian blur is used for rendering. Right row: composite-colour HST images of these nebulae for comparison.