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The update brings fluid simulation tools to load and save presets including the addition of several built-in common fluid types, improvements to the UI, and more.
Fluids Presets
3ds Max 2018.4 now includes fluid presets, making it easier to add fluid simulations to a scene. The included presets consider viscosity from a wide range of common fluid types, from thin liquids like water to thicker liquids like chocolate syrup, honey, and ketchup. Users can also create and save custom settings as presets to more quickly re-use desired fluids in other scenes.
VR engine updates to 3ds Max Interactive
You’ll notice improvements to 3ds Max Interactive, the VR engine added previously in the 3ds Max 2018.1 update.
- A new Physical Light that includes support for IES profiles
- Updated Live Link improves 3ds Max interoperability when using V-Ray
- New environment properties that allow for custom tone mapping post effects
- Updated Texture Manager with usability improvements, making it easier to sort and find textures in a project
Redesigned automation experience
3ds Max Batch has been redesigned to provide a simpler and more effective experience. It is now a true command line productivity tool, with logging and error reporting, it supports user-defined messages in the output, and allows users to inject data in the automation process from the command line.
Autodesk
More details can be found here. Over 100 bug fixes reported by user are listed in the release notes.