EXPORT - Problem with Unreal Engine preset

[Edosss]

Hi, I have this problem. When I export textures using the Unreal Engine 4 preset, the OcclusionRoughnessMetallic texture is empty (same problem when I create a custom preset in Designer). I try with the Unity's preset and I have Ambient Occlusion and Metalness exported correctly.

Log attached.

Can you help me please? Thanks in advance  .
 

[Edosss]

I solved the problem. You have to set the format as JPEG and not PNG.

You can close the topic. Thanks