Importing a primitive mesh from Blender

Hi
I have a problem that is so simple that there seems to be no existing answer for it.
So I create a thread in hope for a helpful answer.
I want to have triangle primitive (actually more like primitive ramp, half a cube) in Daz3D. That is actually my whole problem.
I know Daz3D is not a modelling software and that's perfectly fine. But if there are primitives like cubes and even a torus, it's something from frustrating to insane that one can't insert a simple ramp primitive.
So, my solution: create a trivial mesh in blender, export as .obj, import in Daz3D.
I made sure that it has only tri faces, no quad.
And I made sure that all normals point outwards.
So far so good.
Blender: Export -> obj.
Daz3D: Import -> obj.
Mesh appears.
BUT:
It seems to have no normals. The mesh is just a white area in the scene, not shaded like an inserted primitive cube is.
I googled and found this:
https://www.daz3d.com/forums/discussion/27454/blender-to-daz-tutorial
But all the problems discussed there are not applicable to my case, as far as I can see.
I tried taking the surface of a newly created primitive cube and apply it to the imported mesh, but with no success.
I am not really a 3D modelling guy, just fooling around, so I'm running out of ideas, now :-((.
So my question is: what do I need to do?
Do I lack an UV mapping even if I don't want to have a texture? Shouldn't the correct normals be enough for the faces to get shaded properly?
Thanks for any help!


Comments
The imported emsh will be using the Daz Default Shader - in the Editor tab of the Surfaces pane check that the Ambient colour and strength are not white and 100%.
That was it. Thank you!
I thought I covered exactely that by exporting an inserted cube's surface and applying it to the imported mesh, but I didn't check the actual values after doing so.
Anyway, it works now.
Thanks again.