LTX 2.3 Series: The Professional Video Suite
Last updated: July 21, 2026
Lightricks LTX 2.3 series is a comprehensive professional-grade video suite designed for high-fidelity creation and surgical post-production. From rapid prototyping with the Fast tier to high-resolution cinematic sequences with the Pro engine, this suite provides creators with unparalleled control over motion, duration, and content refinement.
1. LTX 2.3 Pro: High-Fidelity Creation
The LTX 2.3 Pro model is the flagship of the suite, engineered for maximum visual quality and complex motion synchronization.
Cinematic Controls: Beyond standard prompting, users can input both a First Frame and an End Frame to direct specific motion transitions.
Technical Specifications:
Resolution: Supports professional standards including 1080p, 2k, and 4k.
Frame Rate: Flexible options ranging from 24 FPS to ultra-smooth 50 FPS.
Duration: Adjustable clips of 6, 8, or 10 seconds.
Camera Motion: A dedicated selector provides eight distinct cinematic movements, including Dolly (In/Out/Left/Right), Jib (Up/Down), Static, and Focus Shift.
2. LTX 2.3 Fast: Speed-Optimized Iteration
The LTX 2.3 Fast model is the high-performance workhorse of the suite, designed for maximum efficiency.
Fast Model: This model generates video content at incredible speeds, making it ideal for high-volume production and mobile-first workflows.
Synchronized Audio: Despite its focus on speed, it produces videos with native synchronized audio for immediate use.
Prototyping Power: It is the definitive choice for rapid prototyping and testing various prompts or compositions before committing to a high-fidelity render.
3. LTX 2.3 Pro Extend Video: Seamless Lengthening
The LTX 2.3 Pro Extend Video model is designed to add duration to existing footage without losing style or structural consistency.
Continuation Logic: By uploading an Input Video and providing a prompt, the engine generates high-fidelity continuation frames.
Extend Mode: Creators can choose to add duration specifically to the End (or beginning) of a clip to build out longer narrative sequences.
4. LTX 2.3 Pro Retake: Surgical Editing
For precise adjustments to existing assets, the LTX 2.3 Pro Retake engine allows for granular "reshooting" of specific video segments.
Multimodal Replacement: The engine offers three distinct Retake Modes:
Replace Audio: Swap out soundscapes while keeping the visuals intact.
Replace Video: Re-generate visual elements while maintaining the original audio.
Replace Audio and Video: A complete overhaul of a specific segment.
Timeline Precision: Users can define Start Time and Duration for the retake, ensuring only the necessary portion of the 1080p clip is altered.
5. LTX 2.3 Pro Audio to Video: Sound-Led Motion
The LTX 2.3 Pro Audio to Video model generates video where uploaded audio sets the pace and energy. Use it when rhythm, dialogue timing, or musical feel should steer the picture.
Audio-first workflow: Upload an Audio file (**2 to 20 seconds**). The model uses that track to drive the clip. Speech cadence shapes pacing; music or ambience can influence how dynamic the motion feels.
Visual intent: Add an optional First Frame image, or describe the scene in a Prompt (up to 2048 characters) when you do not supply an image. If there is no first frame, a prompt is required so the model knows what to render.
Guidance: Tune Guidance Scale from 1 to 50 so the output follows your text more or less strictly. Defaults in the product differ for text-led runs versus image-led runs (check the control panel for the active default on your setup).
Conclusion
The LTX 2.3 Series represents a significant shift toward production-ready AI video. By offering a dedicated Fast tier for iteration and a robust Pro suite for high-resolution generation and surgical editing, Lightricks provides a complete end-to-end pipeline. Whether you are extending a cinematic shot with Pro Extend or fixing a specific visual detail with Pro Retake, the LTX 2.3 suite delivers the precision required for professional digital storytelling.
6. LTX 2.3 Quality Render to Real: Renders to Photoreal
LTX 2.3 Quality Render to Real is a video-to-video model built for a single job: taking gray clay, CG, or game-engine previews and turning them into photoreal motion. Instead of generating a shot from scratch, it follows the timing, camera, and staging of a render you already have, then re-skins it with real-world materials, lighting, and detail.
What it adds to the series:
Render to Real conversion: drive the shot with your 3D or game render and describe the realistic look you want. Composition and motion stay locked to the source.
First-frame anchoring: supply an optional reference still to fix the materials and lighting of the opening frame, and the rest of the clip follows from it.
Strong V2 intensity: the newest realism setting, alongside Light and Strong, controlling how far the result departs from the original render.
Detail Refine: an optional second pass that doubles width and height for sharper textures and finer detail.
Synced audio: a matching soundtrack can be generated in the same run, so the output arrives with sound already attached.
Key parameters:
Input Video: the 3D, CG, or game render to make photoreal (required).
First Frame Image: optional still that sets the look of the opening frame.
Prompt and Negative Prompt: describe the target realistic result and steer away from artifacts. The negative prompt comes pre-filled with common ones.
Intensity: Light, Strong, or Strong V2 (default). Higher settings push further toward realism.
Resolution: 480p or 720p, measured on the shorter side. 720p covers clips up to about 6 seconds, 480p up to about 15 seconds.
Number of Frames and Frame Rate: set clip length (frames divided by frame rate) and smoothness, up to 361 frames and 60 fps.
Enable Detail Refine and Detail Refine Strength: turn on the sharper second pass and control how much it reworks the image.
Generate Audio: include a soundtrack in the returned video (on by default).
Where it fits: the other models in this series generate, extend, retake, or score video that already looks the way you want. Quality Render to Real sits one step earlier in a 3D or game pipeline: it is the bridge from a rough render to a finished, photoreal plate. Use it when your starting point is a viewport capture or engine preview rather than a text prompt or a live-action clip.
Examples:
A stylized character render turned into a photoreal boy walking a rain-soaked alley at night, with synced audio · Open on Scenario
A game character render pushed to a cinematic, photoreal orc on a smoky battlefield using Strong V2 intensity · Open on Scenario
A CG environment flythrough rendered to a photoreal hilltop restaurant with natural daylight and detailed materials · Open on Scenario