Insights / Gaussian Splatting
4D Gaussian Splatting: Real-Time Rendering of Animated Scenes
4D Gaussian splatting adds time to 3D Gaussian splatting, capturing motion so dynamic scenes render in real time at 50+ fps. How it works and 10 use cases.
By Canopy Creative, Immersive experience studio, Melbourne. Published 21 October 2023, updated 1 October 2026.
In the dynamic domain of real-time graphics and 3D art, the quest for rendering techniques that are not only efficient but encapsulate realism is constant. At Canopy Creative, we follow a culture of incessant innovation. Our exploration into the depths of rendering technologies recently brought us face to face with a method that is brand new and nothing short of groundbreaking - 4D Gaussian Splatting (4D-GS).
As a studio specializing in real-time graphics, 3D art, Virtual Reality (VR), Augmented Reality (AR), and a spectrum of AI-driven solutions, we, at Canopy Creative, are always on the lookout for technologies that can substantially augment the quality and efficiency of our deliverables.
So what is 4D Gaussian Splatting? We explain it below and give our own take. For the technical detail, the original research and the images in this article come from the 4D Gaussian Splatting project page: guanjunwu.github.io/4dgs.
What Is 4D Gaussian Splatting?
4D Gaussian Splatting is a method that extends the concept of 3D Gaussian Splatting by incorporating an additional dimension, time.
It enables real-time dynamic scene rendering while maintaining a high degree of training and storage efficiency. This method significantly accelerates the rendering speed to over 50 frames per second, even on high-resolution settings, marking a monumental leap from traditional rendering techniques.
This means we can capture not only the three dimensions of an object but also its motion through space over time, so animation and movement are captured too.
From Photogrammetry and 3D Gaussian Splatting to 4D
Photogrammetry has long been revered for its capability to create accurate 3D models by meticulously analyzing photographic images. This method excels in extracting geometric information from static scenes to generate detailed 3D representations. However, its prowess comes at the cost of extensive computational resources and time, often rendering it less feasible for real-time applications.
On the other hand, 3D Gaussian Splatting came forth as a breath of fresh air, offering a streamlined approach to representing complex scenes. By utilizing a collection of 3D Gaussians, this method could render detailed static scenes with a comparatively lower computational burden. Yet, its scope remained tethered to static scenes, leaving a void in the real-time rendering of dynamic scenes.
New to the technique? Read What Is 3D Gaussian Splatting? and Gaussian Splatting vs Photogrammetry.
How 4D Gaussian Splatting Works
Breaking free from the shackles of static scene rendering, 4D Gaussian Splatting embarks on a journey into the dynamic realm. By ingeniously extending the principles of 3D Gaussian Splatting, 4D-GS incorporates time as the fourth dimension, paving the path for real-time rendering of dynamic scenes.
The core of 4D-GS lies in its ability to collect a multitude of 3D Gaussians while concurrently extracting both spatial and temporal information. This dual extraction facilitates a more nuanced representation of motion and shape deformations over time. Unlike its predecessors, 4D-GS doesn't just capture a moment in time but chronicles the evolution of a scene, rendering a fluid transition of objects and entities within it.
Furthermore, the methodological design of 4D-GS enables a significantly higher degree of accuracy and efficiency in rendering, which is paramount in applications demanding real-time interactions. The modeling of dynamic scenes in real-time is not just a technical advancement; it's a leap towards a more interactive and immersive digital experience.
Why 4D Gaussian Splatting Matters for Animation
The transition from traditional photogrammetry and 3D Gaussian Splatting to 4D Gaussian Splatting is emblematic of the broader evolution within the 3D art and real-time graphics domain. As 4D-GS continues to gain traction, its potential to redefine the standards of real-time rendering and dynamic scene visualization is becoming increasingly apparent.
The journey from capturing static snapshots of reality to rendering its dynamic essence in real-time underscores the monumental progress 4D Gaussian Splatting brings to the table. It heralds a new era where the digital representation of reality is not just detailed and accurate but vibrantly alive and interactive.
The 4D Gaussian Splatting Capture Process
The capturing process involves collecting numerous 3D Gaussians, analyzing point attributes, and then employing a multi-layer perceptron (MLP) to estimate the new position and shape of each point based on the timestamp.
This procedure ensures a precise capture of dynamic motion, including complex human body motions, thus providing a rich dataset for real-time rendering and further analysis.
- Collecting 3D Gaussians: At the heart of the capturing process lies the collection of numerous 3D Gaussians. A 3D Gaussian is a mathematical function that captures the essence of a point in a three-dimensional space. In the context of 4D-GS, these 3D Gaussians serve as the data points that represent the scene at various instances.
- Analyzing Point Attributes: Once the 3D Gaussians are collected, the next step involves a meticulous analysis of the point attributes. This analysis is geared towards understanding the inherent properties and the spatial orientation of these points, which is crucial for accurately capturing the motion within the scene.
- Employing Multi-Layer Perceptron (MLP): The analysis phase is followed by employing a Multi-Layer Perceptron (MLP), a type of neural network, to estimate the new position and shape of each point based on the timestamp. The MLP delves into the temporal aspect, analyzing the progression of each point over time to provide a precise estimate of their future positions and orientations.
- Temporal Analysis for Dynamic Motion Capture: The utilization of timestamps facilitates a temporal analysis, allowing 4D-GS to chronicle the motion of each point accurately. This temporal analysis is instrumental in capturing complex dynamic motions, including human body motions.
- Rich Dataset for Real-Time Rendering: The culmination of this process results in a rich dataset that is primed for real-time rendering and further analysis. The dataset embodies a precise rendition of the dynamic motion within the scene, enabling real-time rendering with a high degree of accuracy and efficiency.
4D Gaussian Splatting Use Cases
1. Entertainment and Media
- Example: Film production and animation studios could utilize 4D Gaussian Splatting for creating realistic animations and special effects.
- Benefits: The ability to capture and render dynamic scenes in real-time enables creators to visualize complex motions and scenes with higher accuracy, reducing the time and resources required for post-production.
2. Video Games Development
- Example: Game developers can employ 4D Gaussian Splatting for real-time rendering of dynamic game environments and character animations.
- Benefits: Enhanced realism and fluidity in game graphics, providing a more immersive gaming experience. Additionally, real-time rendering capabilities could streamline the game development process.
3. Virtual Reality (VR) and Augmented Reality (AR)
- Example: Developers of VR/AR applications could use 4D Gaussian Splatting to render realistic, dynamic environments for training simulations or interactive experiences.
- Benefits: Improved user immersion through realistic, real-time rendering of dynamic scenes, enhancing the effectiveness of training and educational applications.
4. Architecture and Construction
- Example: Real-time visualization of architectural designs and construction site simulations.
- Benefits: Enhanced decision-making through real-time visualization, enabling stakeholders to experience and interact with designs before construction.
5. Automotive and Transportation
- Example: Real-time rendering of traffic simulations and autonomous vehicle testing environments.
- Benefits: Improved safety and efficiency through realistic simulation and testing, accelerating the development and validation of autonomous systems.
6. Healthcare and Medical Training
- Example: Real-time rendering of surgical simulations and interactive medical training modules.
- Benefits: Enhanced training and education for medical professionals through realistic, interactive simulations, potentially improving patient outcomes.
7. Robotics and Automation
- Example: Development and testing of robotic systems in simulated dynamic environments.
- Benefits: Accelerated development and validation of robotic systems through realistic, real-time testing environments, improving performance and reducing development costs.
8. Aerospace and Defense
- Example: Real-time rendering of flight simulations and battlefield scenarios for training and analysis.
- Benefits: Enhanced training, planning, and decision-making through realistic simulation and analysis of dynamic scenarios.
9. Education
- Example: Interactive learning environments and simulations for enhanced educational experiences.
- Benefits: Improved engagement and learning outcomes through interactive, real-time rendered learning experiences.
10. Marketing and Advertisement
- Example: Marketing agencies can utilize 4D Gaussian Splatting to create high-fidelity, real-time rendered advertisements or interactive digital marketing campaigns. For instance, creating an interactive 3D advertisement where potential customers can engage with dynamically rendered products in real-time.
- Benefits: Engagement: By offering interactive and visually appealing advertisements, companies can significantly enhance user engagement and brand recall. Realism: The realistic rendering of dynamic scenes allows for more authentic and compelling visualization of products or concepts, which can help in building trust and interest among potential customers. Cost-Efficiency: The real-time rendering capability of 4D Gaussian Splatting could reduce the time and resources traditionally required for creating high-quality digital advertisements, thus leading to cost savings. Data Collection: Interactive campaigns could provide valuable data on user interactions and preferences, which can be analyzed for future marketing strategies.
The Future of 4D Gaussian Splatting
The advent of 4D-GS opens doors to a plethora of applications, particularly in the domains of Virtual Reality (VR), Augmented Reality (AR), and real-time graphics. The ability to render dynamic scenes in real-time is invaluable for interactive experiences, gaming, simulation, and training environments. Moreover, the technology holds promise in revolutionizing content creation for films and animations by offering a more intuitive and efficient way to capture and render realistic motion.
Furthermore, the realm of autonomous systems and robotics could significantly benefit from 4D-GS's ability to accurately model and predict dynamic environments in real-time, thus enhancing situational awareness and decision-making capabilities.
As a studio at the forefront of leveraging cutting-edge technologies, Canopy Creative is thrilled about the possibilities 4D Gaussian Splatting unveils. We are committed to exploring and integrating this innovative method to deliver unparalleled real-time graphics, 3D art, and immersive experiences to our diverse clientele, irrespective of project size or budget. The future is bright, and with 4D Gaussian Splatting, the visual narrative is set to become more captivating and realistic than ever before.
4D Gaussian Splatting is not just a technological advancement; it's a paradigm shift in how we perceive and interact with digital environments. At Canopy Creative, we are excited to delve deeper into this technology, honing our expertise to bring the best of real-time rendering to projects and businesses aiming to stay ahead in the digital realm.
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4D Gaussian Splatting FAQs
What is 4D Gaussian Splatting?
4D Gaussian Splatting (4D-GS) extends 3D Gaussian Splatting with a fourth dimension, time. Instead of capturing a single static moment, it captures how a scene moves and changes, so dynamic scenes can be rendered in real time.
How fast is 4D Gaussian Splatting?
The method renders dynamic scenes at over 50 frames per second, even at high resolution, while keeping training and storage efficient.
How does 4D Gaussian Splatting capture motion?
It collects a set of 3D Gaussians, analyses their point attributes, then uses a multi-layer perceptron (MLP), a small neural network, to estimate each point's new position and shape at every timestamp. That temporal analysis is what lets it capture complex motion, including human movement.
What is the difference between 3D and 4D Gaussian Splatting?
3D Gaussian Splatting renders detailed static scenes. 4D Gaussian Splatting adds time, so it can also represent motion and shape changes across a sequence.
What can 4D Gaussian Splatting be used for?
Film and animation, video games, VR and AR training, architecture and construction visualisation, automotive and robotics simulation, medical training, aerospace and defence simulation, education, and interactive marketing.