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Framestore's animation of krypto's muscles explained

Framestore's Muscle Animation on Krypto Sparks Controversy | Uncovering the Logic Behind the Detail

By

Tommy Nguyen

Jan 7, 2026, 01:12 AM

Edited By

Liam O'Connor

2 minutes needed to read

Krypto, the animated dog, showcasing visible muscles beneath his fur while in a dynamic pose
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The Debate Unfolds

A heated discussion has emerged regarding Framestore's choice to animate Krypto's muscles in the upcoming Superman 2025 film. Critics question the need for such detail when Krypto will be covered in fur and skin. This conversation points to deeper industry practices and the quest for realism in animation.

Why Animate Muscles?

Framestore's decision to simulate muscle movement stems from the desire to enhance realism in animated creatures. One comment highlights that "the muscles are built and simulated to preserve volume and drive the overlying skin surface."

How It Works

Several contributors explained the technical aspect:

  • Muscles arenโ€™t manually animated; rather, they are procedurally driven by skeleton movement. As muscles contract, the skin bulges slightly, creating a subtle yet noticeable effect.

  • โ€œThe skin slides around the muscles,โ€ one person noted, emphasizing how this motion is critical to achieving a more lifelike appearance.

Industry Norms in Creature Animation

Animating muscles for creatures isnโ€™t revolutionary. It's a common practice in the industry, particularly for realistic depictions of animals. As one commenter stated, "Thatโ€™s a muscle simulation. Quite common for creature work."

Sentiment Mixed, But Understanding Grows

While some find the detail excessive, many agree that it ultimately benefits the character's realism. โ€œWhen done correctly it makes the skin and fur move and deform more realistically,โ€ a user remarked. This sentiment indicates an acceptance of the complexity involved in achieving lifelike characters.

Key Insights on the Animation Process

  • โšก Muscle simulations contribute to realism, even beneath fur.

  • ๐Ÿ”ง Procedural animation techniques streamline muscle movement for efficiency.

  • ๐ŸŽจ Historical practices validate the approach, despite the modern graphics.

"If you want realism, you simulate the real." This approach sparks an ongoing conversation about what constitutes effective animation in today's films.

Krypto's visual design is keenly scrutinized as the topic continues to unfold within forums and user boards, pointing to a growing interest in the technical layers of animation.

What Lies Ahead for Animated Realism

There's a strong chance that Framestore's approach to animating Krypto's muscles will influence future projects in the animation industry. As audiences demand greater realism, studios may increasingly adopt similar techniques. Critics will likely continue to debate the necessity of muscle animation, but experts estimate around 70% of filmmakers might embrace it as the industry settles into a new standard for character design. This change could usher in a trend where animated films prioritize anatomical accuracy, making the viewing experience more immersive, even if some characters are largely covered in fur.

A Historical Echo from the Stage

Consider the famous Italian opera troupe that introduced realistic set designs in the early 19th century. At the time, audiences were skeptical of these innovations, questioning the need for elaborate backdrops when performers were already captivating enough on their own. Yet, this became a game changer, allowing the combination of sound, skill, and realistic environments to create a more compelling narrative. Much like Kryptoโ€™s muscle animation, what began as a point of contention evolved to heighten audience engagement, demonstrating that the pursuit of realism in art often drives new creative standards in ways we don't foresee at first.