Using the new ubermaterial for shading should ensure greater visual parity between output from OctaneRender and other renderers that support the specification, like Arnold. Other changes include a layered Standard Surface material based on the Autodesk Standard Surface spec. You can see side-by-side comparison images with OctaneRender’s existing PMC and path tracing kernels in this forum thread. The new kernel uses a “novel combination of GPU photon mapping and path guiding” to generate sharp, non-noisy caustics even at very low sample counts. New features in OctaneRender 2022.1 include a new photon tracing kernel, which Otoy describes as making rendering caustics “about 1000x faster ” than the previous implementation. New photon tracing kernel makes rendering caustics ‘nearly free’
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