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• Safe Scene Script Execution offers protection against malicious scripts embedded in 3ds Max scene files.
• The Malware Removal functionality detects and removes known malicious scripts from scene files and startup scripts, to prevent the spread of malicious code to other users.

• Edit Poly modifier support: Smart Extrude has been extended into the Edit Poly modifier, providing the same functionality and features users have come to love from the Editable Poly implementation. 
• “Cut Through” implementation: the latest addition to Smart Extrude, enables artists to extrude with fewer constraints during the creative modeling process.

• Capping: Open holes created by the Slice operation can now be capped along their boundary edges on both Mesh and Poly objects.
• Multi-Axis Cutting: Perform a X-, Y-, and/or Z-aligned planar slice of your mesh based on the position of the slice gizmo through a single modifier.
• Radial Slice: A new Radial slice operation enables control of the cutting results based on a set of user-defined min and max angles.
• Alignment options: Quickly align the cutting gizmo to faces on an object, or reference another animatable object in your scene.

Extrude Modifier

The Extrude modifier, one of the most frequently used modifiers in 3ds Max, offers significant performance improvements to the speed of the initial extrude calculation, and to the responsiveness of the output when adjusting the amount parameter. This allows complex splines, which used to take minutes to process, to be operated on in a matter of seconds. Artists can achieve a desired look faster and more interactively.

Symmetry Modifier

The Symmetry modifier includes new features and enhancements that can now produce faster results, and offers a more interactive experience in the Viewport.

• Multi-Axis Symmetry: Planar symmetry has been updated to perform, X, Y, and/or Z symmetry results on the symmetry gizmo.
• Radial Symmetry: A new Radial symmetry function allows artists to quickly duplicate and repeat a geometry around the gizmo center. 
• Alignment options: Align the symmetry gizmo to faces on an object, or reference another animatable object in your scene.

Relax Modifier

3ds Max now includes a "volume preserve" option which has been added to the Relax modifier. When active, the Relax algorithm will perform additional calculations to reduce small detail and noise out from models, all while retaining the shape and definition of the overall mesh that the modifier has been applied to.

This functionality is especially useful when working with data containing a large amount of unwanted small or microsurface detail, as seen with Scan and Sculpt data. Reducing this small "noisy" data with Relax can improve the processing time of the Autodesk Retopology Tools for 3ds Max.

Rendering

• New render configuration window; faster, snappier, all QT-based UI.
• Quicksilver render settings are now QT-based, for a faster, more responsive experience. 
• By utilizing the new Viewport Ambient Occlusion sampling value in the Viewport configuration settings, users can further refine their Viewport lookdev and optimize their GPU performance by increasing or decreasing the Viewport Ambient Occlusion quality.

• The 'Auto-tx' can now be used to automate the process of converting texture files to .tx file format at render time.
• Imagers can now be applied, removed, re-ordered, and edited directly in a dedicated tab of the Arnold RenderView to post-process rendering without additional render time.
• A new Light Mixer imager makes it possible to interactively edit the contribution of each light group AOVs during and after rendering, without restarting the render.
• Bloom or “glow”, a post-processing effect, has been added to the Lens Effect imager to blur pixels above a given threshold across the frame and simulate light bleeding on an imperfect lens.
• Noice Denoiser is now a post-processing effect. Artists can automatically denoise images every time they render a scene. Edit the denoising settings and see the resulting image directly in the render view.
• OptiX Denoiser: The OptiX™ denoiser is now available as a post-processing effect. This imager also exposes additional controls for clamping and blending the result.

Bake to Texture

The Bake to Texture interface has been simplified to offer easier navigation and selection of baked map types by grouping render elements under common map names. 

Bake to Texture now features a number of new utility maps, such as Rounded Corners and Material ID maps. This enables artists to quickly arrange, what was previously a complex material setup workflow, quickly and easily into Bake to Textures results , using only a few clicks.

Viewports

Turn any floating Viewport into a full-screen, borderless view. When using Presentation Mode, all gizmos are hidden allowing your 3d scene to be the true hero.

Use the “CTRL+Space” hotkey to jump in/out of full-screen Presentation Mode.