![denoiser 2 freezing denoiser 2 freezing](https://i.pinimg.com/originals/dd/29/11/dd2911e51cdc0b3cb307a8d66a6e442c.gif)
Transform2D: The procedural now supports remapping UsdTransform2D to built-in Arnold nodes.Purpose: Usd Purpose is now supported in the procedural.Crease Sets: The procedural now supports crease sets on polymesh.NodeGraph schemas: The procedural now supports using the NodeGraph schema for shader networks.
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Pause and Resume: Pausing and resuming renders are now supported in the render delegate.Half and Double precision: Storing data using half or double precision is now supported in both the render delegate and procedural.Motion blur for the Point Instancer: The render delegate now calculates motion blur when using the point instancer.Light and Shadow linking: The render delegate now supports light and shadow linking.
![denoiser 2 freezing denoiser 2 freezing](https://blog.raybulson.com/wp-content/uploads/2020/04/20200329-astrophotography-5D46386-topaz-denoise-ai-blog-1024x683.jpg)
![denoiser 2 freezing denoiser 2 freezing](https://i.servimg.com/u/f23/11/53/51/49/52407510.jpg)
This can lead to a very significant reduction in GPU memory usage in scenes with volumes, depending on the volume sparsity, compared to the previous dense grid implementation, as shown in the table below.
DENOISER 2 FREEZING DRIVERS
If a single output is sent to multiple drivers the memory is now shared, rather than duplicated (see the first graph below).
DENOISER 2 FREEZING WINDOWS
Faster imagers: Imagers are faster, especially on many-core Windows machines where we have seen up to a 1.7x speedup with the imager_denoiser_noice.For high AA_max renders this can result in noticeably faster renders (core#9022). Faster renders using progressive rendering with adaptive sampling on CPU: When using progressive rendering with adaptive sampling on the CPU, Arnold will now more quickly end the render when there is no more work left to do.Toon shader (contour_filter) optimizations: The toon shader has been optimized, especially for Windows machines with many cores and many small buckets, wherein in some situations we've seen over a 4x speedup (core#10414, #10242).MtoA 4.2.2 works with the following Maya plugins Optix™ denoiser requires an NVidia GPU with CUDA™ Compute Capability 5.0 and above.We recommend using the 460.39 or higher drivers on Linux and 461.40 (Quadro), 461.40 (GeForce), or higher on Windows. See Getting Started with Arnold GPU for more information. GPU rendering works on Windows and Linux only and requires an NVIDIA GPU of the Ampere, Turing, Volta, Pascal, or Maxwell architecture.CPUs need to support the SSE4.1 instruction set.Linux with at least glibc 2.17 and libstdc++ 4.8.5 (gcc 4.8.5).