Arnold is an advanced Monte Carlo ray tracing renderer built for the demands of feature-length animation and visual effects. Originally co-developed with Sony Pictures Imageworks and now their main renderer, Arnold is used at over 300 studios worldwide including ILM, Framestore, MPC, The Mill and Digic Pictures. Arnold was the primary renderer on dozens of films from Monster House and Cloudy with a Chance of Meatballs to Pacific Rim and Gravity.

V-Ray Advanced 6.00.20 For 3ds Max 2018-2023 | 3.3 GB in Total

V-Ray Next Scene Intelligence delivers faster ray tracing, cleaner sampling and more accurate rendering. That means you work smarter – not harder – by automating steps that used to take up valuable time.

Weaver Modifier v2.3.0 for 3ds Max

http://ivanmax.gumroad.com/l/VGdSJ

Modifier creates realtime topology based weaving geometry.
Works on tris/quads/n-gones.
2 weaving options.
v2.1
Preserve UV option added.
Weaving inherit uv mapping from base geometry.
Recommended to use on EditablePoly objects.
Requires 3dsmax 2018.1+

miauu Script Pack vol 2 v6.7 (3ds Max)

https://miauu-maxscript.com/portfolio-item/miauus-script-pack-vol-2/

Corona HDR Total Control v2.5 for 3ds max

https://3dlance.gumroad.com/l/NYtJH

Set-up and control HDRI files and backplates for lighting your scenes in one place without jumping between different 3ds max menus using HDR Total Control. You can control all the relevant HDR options as Exposure, Temperature, mapping, visibility, etc.  HDR Total Control is designed to speed-up your lighting and rendering process and improves your workflow.

V-Ray Advanced 6.00.08 For 3ds Max 2018-2023 | 3.3 GB in Total

V-Ray Next Scene Intelligence delivers faster ray tracing, cleaner sampling and more accurate rendering. That means you work smarter – not harder – by automating steps that used to take up valuable time.

Edge Loop Length Tool v1.1 for 3ds max

http://www.scriptspot.com/3ds-max/scripts/edge-loop-length-tool

Length Tool is a script for 3DS Max which lets you copy and paste (or unify) the length of one or more selected edges / edge loops. It also lets you copy/paste the distance between verts or objects.

V-Ray 6 for 3ds Max 2018 - 2023

https://www.chaos.com/vray/3ds-max

The world's most complete 3D rendering software for high-end visualization and production.
V-Ray® for 3ds Max  is a production-proven rendering software. Known for its versatility and ability to handle any type of project — from massive, dynamic scenes having thousands of lights to a sublime still life — it is the go-to solution for artists and designers across 3D industries. 

Chaos Phoenix v5.00.00 for 3ds Max

https://www.chaos.com/phoenix

Powerful, artist-friendly simulation software for 3ds Max and Maya. Versatile dynamics simulator that seamlessly integrates with Autodesk 3ds Max, Maya, V-Ray and Corona. Chaos® Phoenix is capable of a wide range of effects including fire, smoke, liquids, flames, explosions, rigid body simulations, ocean waves, mist and splashes to list just a few. Quick presets and fast setup make it easy to get started, and its powerful simulation engine offers complete control over more complex effects.

Cgtrader - Voxel Remesh for 3ds Max

https://www.cgtrader.com/3d-models/scripts-plugins/modelling/voxel-remesh-for-3dsmax

Voxel Remesh is a multi-threaded & C++, volume based remeshing plugin for 3dsMax developed by PolyDesign.

Chaos Corona v8.1.0.15380 (hotfix 1) for 3ds Max

https://corona-renderer.com/

Chaos® Corona delivers high-quality, physically based shading for production rendering. Be an artist, not a technician, and achieve realism with greater ease than other rendering software.

VRayPattern is a plug-in for 3ds Max and V-Ray that allows you to multiply geometry without extra memory consumption. As a sample, you can use any tiled geometry (or whose with unobtrusive joints). The plug-in is best used where huge amounts of geometries are required, but without great accuracy.