Exporting to dds for BabylonJS does not work?

[Nodragem]

Hello,

I am not sure that I am using your software properly :) I am trying to convert a .hdr image to a cubemap .dds file compatible with BabylonJS (a web game/3D engine).

Here is the picture I want to convert to .dds:
https://hdrihaven.com/hdri/?c=outdoor&h=spruit_sunrise

You can see screenshots of the problem I am facing in the thread I started here on BabylonJS forum:
https://forum.babylonjs.com/t/pbr-material-how-to-make-roughness-work-as-in-blender-2-80/5636/8

It seems that either I am not exporting to .dds the right way, or there is something that makes it incompatible with BabylonJS... Any idea?