3ds Max 2022.3 Update

Per Viewport Filtering

You can hide/unhide objects by category or by class per each viewport. Each viewport's settings can be set independently from one another, giving you the flexibility to display what you need in a given viewport. Per-Viewport Filtering does not affect the scene or renderer.

Pipeline integration

Environment Customization - Enable studios to configure the software and enable their artists to easily switch between projects that require a uniquely configured environment, script, and plug-in environment using environment variables.

Advanced Wood OSL Shader

Designed to match the accurate appearance of many common wood types such as maple, walnut, and oak. Delivering a rich and vibrant result that is easy to configure, displays beautifully in the viewport and in any OSL compatible renderer. UVW can be modified with external shaders, and a random seed can be driven to have per-object variations.

Sketchup 2021 Support

Allowing users to successfully import SketchUp 2021 models into the software where they can continue to model and render the asset.

Arnold
Intel open image denoiser imager included. The Tonemap Imager now supports a Look-up Tables (LUT) mode to apply to a LUT file in any format supported by OCIOv2. Arnold lights also now have new defaults that give better first render results, along with sticky settings that allows you to create lights with the same setting as the light previously created.

Performance

Resolved Viewport Lag from High Polling Gaming Mouse Devices issue where the viewport performance in Standard or High Quality mode would be affected by the high polling rate from gaming mouse devices. Further optimized the File Save system to provide an additional 20-40% percent boost in efficiency.
Improved scene load performance when a large number of animation clips are present in the scene. For example, a provided user scene file with half a million clips opened 10 times faster.

Modeling

Smart Extrude - treatment to deal with when either the extruded faces or the target face were significantly non-planar. Now, under the hood we split all faces along any non-flat diagonals at the beginning of the operation, and re-merge them at the end, so arbitrarily non-planar faces now work just as well as planar faces.

Symmetry modifier - a new "Slice Cleanup Threshold" to the "Slice Along Mirror" option has been added in 3ds Max 2022.3. This threshold will allow you to further control the cleanup of vertices that are in close proximity to one another along the cutting plane before the Symmetry action takes place.

Chamfer modifier - "Limit Affects" functionality has been updated to generate improved results on non-planar faces and non-collinear chamfered edges.

More info on Autodesk site.