MaterialX: a look-breaking update to MaterialX 1.38Īrnold’s support for MaterialX has been updated to MaterialX 1.38, the major update to the open standard for rich material and look development data rolled out earlier this year.ĭue to the underlying changes to the format, looks and materials exported from Arnold are now expressed as combinations of Nodes and Inputs, rather than ShaderRefs and Params.Īlthough Arnold 7.0 can still render MaterialX documents exported from previous versions of the software, the changes are potentially look-breaking.
Other changes include support for path mapping when loading USD files, the option to calculate motion blur using velocity or acceleration primvars, and the option to write multiple frames to a single USD file. The update also adds support for UsdImaging adapters, making it possible to “transparently use Arnold-specific procedurals and shapes” in the USD Hydra viewer. Support for USD-based workflows, introduced in Arnold 6.0, has been expanded, with Arnold 7.0 adding support for deep rendering and light linking. USD: support for deep renders and light linking According to Autodesk, “GPU volumes now consume less VRAM than the equivalent CPU volumes consume RAM”. The improvement makes GPU rendering more memory-efficient than CPU rendering for volumes. In addition, GPU memory usage has been reduced when rendering polygonal geometry, with scenes with “heavy subdivisions” using “around 33% less GPU memory” than Arnold 6.2.1.Īrnold also now uses NanoVDB, Nvidia’s simplified GPU-based representation of OpenVDB volumes, with Arnold 7.0 providing a further 50-60% reduction in memory usage over Arnold 6.2.1. The matte shader, matte closure and matte shape flag are all now supported on the GPU. In addition, full-frame imagers are now updated during rendering, making it possible to preview the output of an imager chain before the entire frame has finished rendering.Īrnold GPU: matte support and reduced memory usageĪrnold’s GPU rendering framework, introduced in Arnold 5.3, continues to evolve, with Arnold GPU getting matte support for rendering holdout effects. LUTs can be applied in any format supported by the OpenColorIO 2 colour-management standard, which Arnold was one of the first VFX applications to support, including. The existing tonemapping imager gets a new LUT mode for applying LUT-based looks to images. Post-processing: new imager for colour correction, support for LUT-based looksĪrnold 7.0 also expands the framework of ‘imager’ post-processing nodes introduced in Arnold 6.1 last year.Īs well as the OIDN denoiser, new imagers include imager_color_curves for colour correction, which provides separate control curves for individual RGB components and overall luminance, as shown above. Real-time colour correction: imager_color_curves makes it possible to adjust RGB components individually, with Arnold now previewing the output of an imager chain before the entire image has rendered. It is provided in parallel with Arnold’s old CPU-based denoiser and Nvidia’s GPU-based OptiX denoiser.īoth the OIDN and OptiX denoisers can make use of Arnold 7.0’s new denoise_albedo_noisy AOV, which adds specular reflections and refactions to the albedo, potentially improving denoising quality. The 7.0 update makes Arnold the latest renderer to integrate Open Image Denoise (OIDN), Intel’s AI-trained CPU-based render denoising framework. The update also significantly extends USD workflows, adding support for deep AOVs and light linking adds support for MaterialX 1.38 and makes ACEScg the default colour space for rendering. Autodesk has released Arnold 7.0, the latest version of the production renderer, adding support for Open Image Denoise, extending the post-processing framework, and reducing memory usage in Arnold GPU.
0 kommentar(er)
