Luma, an AI video and 3D model company backed by a16z, has released a new model called Ray3 Modify that allows users to modify existing footage by providing character reference images that maintain the performance of the original footage. Users can also provide start and end frames to guide the model to generate transition footage.
The company announced Thursday that its Ray3 Modify model solves the problem of maintaining human performance when using AI to edit or generate effects for creative studios. The startup said the model better follows input footage, allowing studios to use human actors for creative or branded footage. Luma said the new model retains the actors’ original movements, timing, gaze and emotional expressions while changing scenes.
Ray3 Modify allows users to provide a character reference to transform into the original footage and transform the appearance of a human actor into that character. This reference also allows creators to retain information such as costumes, likeness, and identity throughout the shoot.
Additionally, users can also provide start and end reference frames to create videos using the new Ray3 Modify model. This helps creators direct transitions and control character movement and behavior while maintaining continuity between scenes.
“Generated video models can be very expressive, but they can also be difficult to control. Today, we’re excited to introduce Ray3 Modify, which blends the expressive power of the real world and AI with full creative control. This means creative teams can capture a performance on camera, instantly modify it anywhere imaginable, change costumes, or even go back and reshoot the scene in AI without recreating the physical shoot.” said Amit Jain, co-founder and CEO of Luma AI. statement.
Luma said the new model will be made available to users through the company’s Dream Machine platform. The company, which competes with companies like Runway and Kling, released video correction features in June 2025.
The release of the model builds on the startup’s new $900 million funding round, announced in November, led by Saudi Arabia’s Public Investment Fund-owned AI company Humane. Existing investors including a16z, Amplify Partners, and Matrix Partners also participated in the round. The startup also plans to build a 2GW AI cluster in Saudi Arabia with Humain.
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