Black HLOD

Development Rendering
1

Hi, I am experiencing a bad issue with HLODs… I usually have to rebuild my HLOD 5-6 times before having a result which is not black as the image

hlod.JPG
hlod.JPG994×672 51.4 KB

I am using Simplygon 8 with UE4, and I enable the Simplify Mesh checkbox to make them work together.
What can be the cause this? I am wasting a lot of production time…

Thank you.

edit:

HLOD SETTINGS

hlodsett.JPG
hlodsett.JPG840×967 55.7 KB

2

Still having this issue, also with other structures. No one knows how to solve it? I am using 4.15
b63fe5f4f60f9123fb98c52126fe90cd8113348a.jpeg