SAN FRANCISCO — Just when you think you have Twenty One Pilots all figured out, think again. The alt-rock duo’s Icy Tour rolled into Chase Center on a soggy Sunday night; somewhat fitting for the weather-based motif. As many times as the duo has played Northern California, few appearances have been their own shows. Fans who saw the band last May at BottleRock Napa Valley were treated to a nearly entirely different set on Sunday.

Where the BottleRock set was relaxed, the Chase Center show was focused. The set design was one of the most expansive of duo’s career and each song felt like it had a unique production element. The set was also weighty, fitting in more than two dozen songs (many shortened) into about two hours.

Smoke and fake snow billowed into the arena as vocalist Tyler Joseph and drummer Josh Dun, both wearing ski masks, entered the stage from a blue door opening from the floor. The near-capacity audience roared.

The relatively stark backdrop of opener “Good Day” exploded into the dramatic lighted spectacle of “No Chances.” At one point, smoke started coming from Joseph’s black ski mask as he stepped into the drab yellow hue and snowfall. Some of the old standbys were certainly there as well. Dun executed a backflip off of the keyboard during “Holding On To You,” for example

The show kicked into high gear with the introduction of the backing band, which has been touring with Twenty One Pilots this album cycle. The full band tracks has a magnetism and energy that contrasted from the duo solo performances, though both arrangements excelled in different ways. Dun benefitted from locking into a groove with bassist Skyler Acord. It brought some of the material to life even more. Lead guitarist Dan Geraghty and MuteMath’s Todd Gummerman added extra fire power, while Jesse Blum (formerly of MisterWives) added depth on trumpet.

Joseph donned a sparkly leather coat, one of a handful of costume changes for the night, on the bouncy “The Outside.”

On of the show’s best moments may have been its simplest. After “Lane Boy” and “Chlorine,” Joseph walked through the crowd during the funky “Mulberry Street” to an elevated B-stage with a piano at the back of the room. He sat behind the piano, playing a song solo from each record in the band’s catalog with the help of the crowd singing a melodic line to transition between each one.

“You’ve been the glue that’s held this all together from the start,” Joseph said in what became a poignant and well-executed moment of simplicity amid the organized chaos. He then picked up a ukulele for “The Judge” and “Migraine” before making his way back to the main stage to join the rest of his bandmates for a campfire singalong.

“I forgot to bring my ukulele with me, can you guys get it to me?” he asked, to which fans obliged by returning the instrument strapped on to a giant mattress that made its way across the pit.

The campfire jam (with actual campfire) was another opportunity to mix in a handful of songs as a medley. At one point, Dun joined Blum with a trumpet of his own. What worked so well about the band’s set was not only its flow, but the number of opportunities the band had to show off musical chops in different ways.

Following a trumpet solo by Blum that included a cover of the “Halo” theme song, the band brought out the big guns like explosive performances of “Jumpsuit” and “Heavydirtysoul,” both with plenty of pyro and smoke cannons. Dun hopped onto his drum island during a raucous performance of “Saturday.”

“I include this song in this set list every night because I wrote it at a time when I thought live music was dead,” Joseph said of the upbeat “Level of Concern.” “But looks at us. We’re here!”

It wasn’t the last time Joseph would visit the crowd. He performed a verse of “Ride” on both sides of the lower bowl and moved to a tower at the back of the room for “Car Radio.” The band even mixed in a surprisingly fiery rendition of “Shy Away.” Maybe Joseph’s most impressive feat of the evening was doing a full belly flop onto the aforementioned mattress, being held up by the crowd, on which he then crowd-surfed all the way back to the main stage. It takes an awful lot of for that to go right, but it did!

After finishing the main set with “Stressed Out” from the platform, the band returned to the stage for an encore of “Heathens” and the the explosive “Trees.”

“We’d love to come back and play this venue again someday,” Joseph said. “We’ll probably be older, but that’s OK. You’ll be older, too.”

The night began with newcomer Peter McPoland, who warmed up the crowd with an unrelenting energy that won attendees over. McPoland knew his mission.

“If you’re here for me, I appreciate it,” McPoland slyly said. “If you’re not, that makes way more sense.”

The singer-songwriter bounced and ran side to side throughout just about every song, mixing in “Shit Show,” “Tonight” and “Romeo and Juliet.” He even threw in a cover of “Twist and Shout,” gettin a rise out of the crowd. McPoland, who found success through TikTok, thanked Twenty One Pilots for bringing him on tour several times, and held his own on stage.

Follow writer Mike DeWald at Twitter.com/mike_dewald. Follow Chloe Catajan at Instagram.com/riannachloe.