UE5 engine changes

What parts of UE4 have been removed or deprecated in UE5.

Audio

  • Removed
    • Legacy audio backend (5.0) - deprecated, made obsolete by Audio Mixer
  • Deprecated
    • Old audio system (5.x) - made obsolete by MetaSound

Core

  • Removed
    • 32-bit platforms (5.x) - most supported platfroms are currently 64-bit
    • Event-Driven Loader (5.0) - replaced with Zen Loader system

Networking

  • Removed
    • Legacy Socket Systems (5.0) - made obsolete by ASIO (SocketSubsystemBDS, SocketBuilders, etc.)
    • Unused Packet Encryption (5.0) - only DTLS is used currently

Non-linear animation

  • Removed
    • Matinee (5.x) - deprecated for a long time, replaced by Sequencer. It's possible to convert assets.
    • Sequence Recoder (5.0) - replaced by Take Recorder.
    • Movie Scene Capture (5.0) - replaced by Movie Render Queue.

Physics

  • PhysX depreacated in 5.0, replaced with Chaos.
  • PhysX gonna be removed entirely in 5.1.

Programming

  • Removed support for Visual Studio 2015/2017 (5.0)
  • Added support for Visual Studio 2022

Rendering

  • Removed
    • Legacy Tonemapper (5.0 EA)
    • Distance Field GI (5.0 EA) - replaced by Lumen
    • Light Propagation Volumes (5.0) - made obsolete by Lumen
    • Hardware Tesselation (5.0) - made obsolete by Nanite
  • Deprecated
    • Cascade (5.x) - replaced by Niagara, it's possible to convert assets.
    • Atmospheric Fog - replaced by physically-correct Sky Atmosphere.

World building

  • BSP (5.x) - deprecated in 5.0 EA for editing, volumes still use them. Mesh Editor Tools replace BSP for mesh editing.
  • World Composition deprecated (5.0 EA), althought its code is untouched. Meant to be replaced by World Partition.

Further read

Updated ago