Luma Launches Ray3 Modify AI Model for Video Generation

Luma, the a16z-backed AI video and 3D technology startup, has launched a powerful new model called Ray3 Modify, designed to give creators far more control over AI-generated video while preserving real human performance.

The new model allows users to generate video transitions using a start frame and an end frame, as well as modify existing footage using character reference images—without losing the actor’s original motion, timing, or emotional delivery.

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🎥 What Is Ray3 Modify?

Ray3 Modify is Luma’s latest generative video model built for creative studios, filmmakers, and brand teams. Unlike traditional AI video tools that often distort human motion, Ray3 Modify focuses on faithfully following input footage.

According to Luma, the model retains:

• Actor motion and timing
• Eye line and facial expressions
• Emotional delivery
• Performance continuity

This makes it especially useful for cinematic storytelling, ads, and branded content.

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🧠 Key Features of Ray3 Modify

1. Character Reference-Based Video Editing

Creators can upload a character reference image and transform an actor in existing footage into that character.

The model preserves:

• Costumes and likeness
• Identity across scenes
• Performance realism

This enables creators to “reshoot” scenes with AI—without bringing actors back on set.

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2. Start and End Frame Video Generation

One of the most notable features is the ability to define a start frame and an end frame, allowing Ray3 Modify to generate smooth transitional footage between them.

This gives creators:

• Control over transitions
• Direction over character movement and behavior
• Visual continuity between scenes

It’s particularly useful for VFX shots, narrative transitions, and controlled scene changes.

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🎬 Why This Matters for Creative Studios

Generative video models are powerful but often hard to control, especially when working with human actors. Luma says Ray3 Modify bridges the gap between real-world performance and AI flexibility.

“This means creative teams can capture performances with a camera and then immediately modify them to be in any location imaginable, change costumes, or even go back and reshoot the scene with AI, without recreating the physical shoot,”
— Amit Jain, Co-founder & CEO, Luma AI

This approach allows studios to reduce reshoot costs, iterate faster, and experiment creatively without sacrificing realism.

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🧪 Where Ray3 Modify Is Available

Ray3 Modify is now live on Luma’s Dream Machine platform, which already supports AI-powered video generation and modification tools.

Luma competes directly with platforms like:

• Runway
• Kling
• Other generative video startups

The company first introduced video modification tools in June 2025, and Ray3 Modify is a major step forward.

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💰 Backed by Major Funding & Expansion Plans

The model launch follows Luma’s $900 million funding round announced in November, led by Humain, an AI company owned by Saudi Arabia’s Public Investment Fund.

Other investors include:

• Andreessen Horowitz (a16z)
• Amplify Partners
• Matrix Partners

Luma is also planning to build a 2GW AI compute cluster in Saudi Arabia in partnership with Humain, signaling massive scale ambitions.

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🔍 Final Thoughts

Ray3 Modify highlights where AI video generation is heading: more control, better realism, and real-world usability. By preserving human performance while offering AI-powered flexibility, Luma is positioning itself as a serious tool for professional creators—not just experimentation.

As competition in AI video intensifies, models that blend expressivity with precision are likely to define the next phase of the industry.

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❓ FAQs

What is Luma Ray3 Modify?

Ray3 Modify is an AI video model by Luma that lets users modify existing footage or generate video using start and end frames while preserving human performance.

Can Ray3 Modify preserve actor movement and emotion?

Yes. The model retains original motion, timing, eye line, and emotional delivery of human actors.

What is start and end frame video generation?

It allows creators to define a beginning and ending frame, and the AI generates smooth transitional footage between them.

Where can users access Ray3 Modify?

Ray3 Modify is available through Luma’s Dream Machine platform.

Who funds Luma?

Luma is backed by a16z and recently raised $900 million led by Saudi Arabia’s PIF-owned AI company Humain.