Build light reproductible crash with imported landscape

Development World Creation
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1

Hello

Reproductible crash on build Lighting with UE4.8 preview 3

  1. Create a new level

  2. Create landscape

  • Import Heightmap 2017*2017 (r16)
  • Assign Landscape Material (8 layers)
  • Create 8 LayerInfo

  1. Build Light (exporting light data stuck at 34%)

  2. Crash

This not happens in 4.8 preview 2

2

I have downloaded Sources from Github and compiled them (Devemopment Editor X64).
No more Issues!

3

i just make flat landscape in preview 4 build light and it crashes …