NVIDIA has released ovrtx 0.7.0, which lets ParticleField Gaussian splats be relit by scene lights through a bundled MDL material.
ovrtx gained splat support in 0.2.0 through the OpenUSD ParticleField schema, with splats drawn by a default emissive material that carries their captured appearance. The new ParticleFieldSHDiffuse.mdl ships inside the SDK package at bin/mdl/ParticleFieldSHDiffuse.mdl, so no material authoring is required. Bound to a ParticleField, it illuminates the Gaussians with scene lights in Path Tracing and Real-Time Path Tracing, and it has no emission.
ParticleFieldSHDiffuse.mdl derives diffuse albedo from each splat's degree-zero spherical harmonics coefficient, SH0, so light intensity and color change the rendered result. The material exposes no inputs, and the SH coefficients stay on the ParticleField. Real-Time Path Tracing resolves splat transparency stochastically by default, and the comparison images in the ovrtx documentation are taken after 32 accumulated frames.
NVIDIA's documentation states that captured illumination remains baked into SH0, so the material does not recover unlit surface color from a capture. The same page calls it "a reasonable approximation for many use cases."
ovrtx 0.7.0 also adds experimental lidar rendering of NuRec-trained Gaussian splats in the WPM sensor model through lidarExtraSignals. Ordinary RGB splats return no lidar response. Three splat fixes ship alongside it. Gaussian cameraDistance sorting now uses distance from the camera rather than projection onto the ray, invalid Gaussian positions no longer push NaN or Inf values into acceleration structure updates, and Gaussian segmentation in Minimal synthetic data modes 0 to 2 now matches rendered geometry and bounding boxes.
Outside splats, DLSS-NR comes to Linux, RenderVars gain AV1 compression on GPUs with an NVENC AV1 encoder, new data-provider APIs load assets including NuRec volumes from application memory, and a set of C, C++ and Python API changes are breaking. Anonymous startup telemetry is now on by default, with an opt-out described in TELEMETRY.md.
Like every ovrtx release so far, 0.7.0 is marked as a pre-release on GitHub, while PyPI lists it as the current version. SDK packages cover Windows x86_64 and Linux x86_64 and aarch64 under the NVIDIA Software License Agreement. The ovrtx 0.7.0 packages are published on GitHub.
