TRON: Tracing Rays to Orchestrate a Neural Renderer for 3D Gaussian Reconstructions
Quick Answer
This paper shows that TRON integrates 3D Gaussian ray tracing with neural rendering, achieving realistic rendering of dynamic 3D scenes with improved editability and speed.
Quick Take
TRON integrates 3D Gaussian ray tracing with neural rendering, achieving realistic rendering of dynamic 3D scenes with improved editability and speed. It outperforms traditional Gaussian-based methods and prior neural renderers, enabling practical interactive applications in real-world environments. The framework is trained on a dataset of 2.1M frames, enhancing its capability for realistic relighting and material editing.
Key Points
- TRON combines ray tracing and neural rendering for enhanced scene realism.
- Outperforms Gaussian-based relighting methods in terms of realism.
- Supports dynamic object motion and material editing in real-time.
- Trained on a dataset of 2.1M rendered frames for robust performance.
- First method enabling practical interactive applications in 3D environments.
Paper Resources
Article Content
From source RSS / original summaryarXiv:2606. 11314v1 Announce Type: new Abstract: We introduce TRON, a rendering framework that combines 3D Gaussian ray tracing with neural rendering to enable realistic and controllable rendering of real-world 3D scenes under novel lighting, dynamic object motion, object insertion, and material editing.
Prior approaches that rely solely on physically based rendering (PBR) of Gaussian representations struggle to achieve realistic relighting due to imperfections in reconstructed geometry, material estimates, and light transport estimation. At the same time, neural rendering methods often lack an explicit scene representation, limiting their ability to support interactive editing with fine-grained manipulation. TRON bridges these two paradigms.
We use intrinsic decomposition priors from a learned inverse rendering model to regularize the material properties of a Gaussian field, and repurpose a ray tracer to provide radiometric guidance rather than final pixels. By treating this output as a structured 3D scaffold, we empower a lightweight neural renderer to bridge the domain gap between shading-model constrained estimates and photorealistic output.
Our key insight is that the combination of explicit 3D knowledge with robust material priors provides speed and controllability, while neural rendering enables the synthesis of photorealistic images. To support real-world scenarios, we train our neural renderer with a multi-stage strategy consisting of large-scale pretraining and targeted fine-tuning on a newly constructed dataset of 2. 1M rendered synthetic and real-world frames from 3D reconstructions.
TRON outperforms Gaussian-based relighting methods in realism, and prior neural renderers in editability and speed. To the best of our knowledge, TRON is the first method to enable practical interactive applications in captured 3D environments, offering realistic appearance under dynamic geometric, lighting and material conditions.
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