It: Welcome to Derry's 'It' is a show that captivates with its practical, visceral effects and a commitment to old-school horror film work. The show's VFX supervisor, Daryl Sawchuk, and series co-developer Andy Muschietti share a philosophy of shooting as much as possible practically, aiming for high-quality photography and a visceral experience. This approach is evident in the show's surreal and terrifying creations, like the Mother Thing, which was filmed on set with practical effects and minimal post-production. The show's commitment to practical effects is also seen in the birthing sequence, where the prosthetics team puppeteered the baby, and in the iconic Pennywise the Clown, whose design was upgraded to be more anatomical and aggressive-looking. The show's production design and photography were also pushed to their limits, with an unusual amount of time and resources dedicated to the VFX development. The result is a show that is both visually stunning and emotionally engaging, with a commitment to the horror genre's roots in practical effects and visceral storytelling. This commitment to practical effects and a visceral experience is what makes It: Welcome to Derry's 'It' so captivating and unique in modern genre TV.