Mary Poppins Returns comes to Digital HD on March 12 and 4K, Blu-ray and DVD on March 19, 2019. We had a chance to speak with Visual Effects Supervisor, Matt Johnson, who has also worked on  work includes Now You See Me 2, World War Z, V for Vendetta and Into the Woods, just to name a few. Johnson talks about creating a visual story using practical and CG effects while staying true to the original Mary Poppins some 50 plus years prior.