Avatar: Fire and Ash

It might be familiar from a narrative and thematic standpoint, but Avatar: Fire and Ash is a dazzling technical achievement that visually surpasses even its game-changing predecessors.

The latest chapter in the epic eco-thriller franchise is another rousing adventure that builds upon director James Cameron’s science-fiction vision, even as the storytelling spins its wheels.

More than anything, it once again fully immerses us in its ambitious futuristic realm with seamless visual effects and motion-capture technology, meticulously detailed character and creature designs, painstaking background detail, and sumptuous cinematography.

This new installment takes us back to the lush moon Pandora, where a small Na’vi tribe led by ex-soldier Jake (Sam Worthington) and Neytiri (Zoe Saldana) is mourning the death of the couple’s eldest child.

Meanwhile, they continue to raise Spider (Jack Champion), the human son of Jake’s vengeful nemesis, Quaritch (Stephen Lang), while shielding Spider from potential harm from outsiders. In addition, adopted daughter Kira (Sigourney Weaver) deepens her spiritual connection to Ewya, the land’s guiding force.

As they’re still reeling from various conflicts between worlds and species, a new threat emerges from the Ash People, a collection of warriors emerging from the shadows. Their fiery commander is Varang (Oona Chaplin), who finds an eager ally in Quaritch and his military resources.

In the resulting clash between preservation and evolution, access to weapons equates to power, and Jake prepares for another battle. “We have to stand strong,” he explains. “This family is our fortress.”

Amid the maze of deception, betrayal, shifting loyalties, and ulterior motives, the film scrutinizes the folly of imperialism, culminating in an inevitable yet stirring high-stakes final showdown.

The somewhat convoluted screenplay expands upon the mythology and character arcs from the prior films, even if it’s not ultimately as profound or sophisticated as intended. The moral dilemmas become repetitive, and you’ll have to forgive the cheesy dialogue.

Newcomers might want to study up, however, because there’s not much context provided for the conflicts. And too many of the action sequences — whether by air, land, or sea — resemble video-game confrontations.

As it promotes embracing differences while also celebrating what we have in common, Fire and Ash is more impressive for its expansive visual scope than its narrative audacity.

Such underlying messages are hardly subtle but still resonate powerfully in a film where peaceful coexistence has never seemed so elusive.

Rated PG-13, 197 minutes.