Unreal Engine 4.26 Documentation -

Built-in Niagaran integration drives realistic hair physics, including wind response and collision.

First introduced as an experimental feature, 4.26 brought the to production-ready status. unreal engine 4.26 documentation

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For level designers and animators, Unreal Engine 4.26 added tools designed to handle massive, collaborative open-world pipelines. Landmass and Landscape Editing unreal engine 4.26 documentation

Documentation for C++ and Blueprints.

The component interacts dynamically with the Volumetric Clouds system. According to the documentation, this system uses a physically-based ray-marching approach to simulate real-world atmospheric scattering.