Unreal Engine 5.0 Preview

General Announcements
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Some issues that still exist:

  • GatherRayTracingWorldInstances and BuildTLASInstanceBuffer (or CPU cost for ray tracing) is about 10x more expensive in latest UE5 vs UE4 (5EA2 was ~3x more than UE4) which makes eg. grass unusable with ray tracing while perf was completely fine in UE4
  • Landscape grass with meshes that have WPO enabled have (very) incorrect motion vectors in preview 2
  • Nanite meshes in landscape grass do not spawn
  • Raytracing instance culling is broken with landscape grass.
  • Visible in ray tracing switch is broken for foliage (possibly for HISM in general)
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