HBO's horror prequel series It: Welcome to Derry finally made its chilling debut on October 26, just in time for Halloween. The show is based on Stephen King's eponymous novel which was also adapted into two movies in 2017 and 2019, respectively.The It: Welcome to Derry premiere re-familiarized us with King's Derry, a fictional cursed town in Maine. The show is set 27 years before the first It movie and will chart out the origin story of the shape-shifting clown Pennywise. Swedish actor Bill Skarsgård returns to his breakthrough role of Pennywise the clown, who returns for a new cycle of horror and violence every 27 years.Episode 1 was chilling and sets the thrilling tone for the upcoming episodes. While expectations were sky-high for the return to Derry’s haunting streets, early viewers have expressed disappointment over what they’re calling “bad CGI” and underwhelming visuals.Here's what fans are saying about Episode 1.*Disclaimer: This article contains spoilers for It: Welcome to Derry Episode 1. Readers' discretion is advised.*Fan reactions to 'bad CGI' in the It: Welcome to Derry premiere View this post on Instagram Instagram PostHate it or love it, everybody is talking about the It: Welcome to Derry premiere. After terrorizing a generation of children through the It film franchise, Pennywise is back in his origin story in the prequel series. Episode 1 introduced a new group of children who were lured into the creepy clown's trap and their curiosity led to a horrific blood bath and many deaths, which Barbara Muschietti is calling 'our Red Wedding.'While Pennywise did not make an appearance in It: Welcome to Derry yet, we were greeted with a weird mutant baby who killed Teddy, Phil and his sister in the final moments of the premiere. The eerie atmosphere of the movie theatre scene was chilling but some fans feel that the mutant baby's bad CGI ruined this experience for them. Here's how fans are complaining about the bad CGI:''As a fan of the book and the other screen versions I was kind of expecting something more convincing than a bad CGI monster baby (they already kind of did that in IT Chapter Two during the Chinese restaurant scene) and possessed pickles.'' a Reddit user wrote''If the cgi wasn't so baaaaad that theatre scene might have had a bigger impact on me. I couldn't get over how cheesy that baby monster looked lmao.'' another fan complained on XWhile the theatre scene was bloody, sudden and set the tone for It: Welcome to Derry, fans were disappointed with its visuals.Fans enjoyed the unpredictability in the It: Welcome to Derry premiere View this post on Instagram Instagram PostAfter Teddy and Phil's brutal deaths in the It: Welcome to Derry premiere, it looks like nobody is safe in the horror prequel series. While fans were anticipating how Phil, Teddy and Lily would uncover the sinister truth behind Matty's disappearance, two of them ended up dead. Fans appreciated how the show subverted their expectations of seeing Phil, Teddy and Lily create a new Loser's Club.This is how Reddit users reacted to Teddy and Phil's sudden deaths in the It: Welcome to Derry premiere:''Nice rug pull to give those kids arcs & personalities then brutally take them out like that lmao.'' a user wrote''Starting with an episode like this means they now have a lot to deliver on. Especially when it looks like the following episodes have a slightly different feel and tone. Looking forward to episode 2.'' another user gave a positive feedback''That ending was CRAZY. Props to them for the balls on that plot point.''''Killing half the presumed cast in the first episode is always a fun move!'' another user agreedWhile the pouring fan reactions are mostly positive, some fans were left heartbroken with the sudden deaths in the It: Welcome to Derry premiere. Even in their limited screen time, the characters managed to charm fans and they wanted to see more of them.''I am a bit torn about that ending. I really liked the dynamic between the two boys. I thought they were the best characters so far but now they ded. But I also liked how the show isn’t holding back.'' a user seemed conflictedThe spectrum of the above comments might be extreme but they suggest that Stephen King fans are invested in this prequel series, which promises to expand on the author's horror universe.If you are someone who enjoyed the It: Welcome to Derry premiere and cannot wait for Episode 2, you are in luck. The show has decided on an early release for Episode 2 on HBO Max (on October 31).For the latest scoops on your favorite TV shows and movies, follow SoapCentral.