In the realm of digital artistry, behold an anthropomorphic blue owl, a marvel of creativity and ingenuity. This exquisite portrait captures the essence of this enchanting creature with meticulous attention to detail. 

At the center of this composition are the owl's striking big green eyes, shimmering like emerald jewels, radiating an aura of mystique and wisdom. The artist has bestowed upon this avian figure an otherworldly presence, making it feel almost alive.

The owl's form is adorned with finely detailed armor, a masterpiece of craftsmanship that merges the worlds of fantasy and reality. Each piece of armor bears intricate filigree metal designs, a testament to the artist's dedication to their craft. The patterns intertwine and dance across the owl's form, creating a mesmerizing tapestry of elegance.

Cinematic lighting bathes the scene in a dramatic glow, casting shadows and highlights that emphasize every contour and texture. The realism achieved in this rendering is nothing short of breathtaking, with the owl's feathers and armor reflecting light with astonishing fidelity.

Rendered in astonishing 8K resolution, this work of art comes to life in Unreal Engine, a testament to the boundless possibilities of modern digital artistry. The Octane and Redshift renders have been skillfully harnessed to ensure that every detail, every facet of this masterpiece, is brought to life in stunning, realistic glory.

In conclusion, this portrayal of an anthropomorphic blue owl, resplendent with its big green eyes, finely detailed armor, intricate filigree metal design, and brought to life through cinematic lighting and high-resolution rendering in Unreal Engine, Octane Render, and Redshift Render, stands as a testament to the extraordinary talents of the artist who crafted it. It is a breathtaking fusion of imagination and technology, a true masterpiece in the world of digital art.