Exporting OBJ with smoothing faces
You have two different problems:
The geometry has a huge ngon with lots of verts. The ngon is imported dynamically to DAZ and breaks. The solution is a better topology. But a quick fix is to convert the object to edit mesh. Then edge mode, display properties (bottom edit mesh panel) , select all edges and use the make visible button. This will convert the ngon in triangles and will stop DAZ re interpreting the model.
The second problem is that DAZ has no way to import smoothing groups from OBJ. but you can go to surface and modifier the angle of the smoothing of the object. It will display fine.
Accepted solution
Well I'm not a professional modeler so there was no way I could find or follow your instructions to achieve the results you were suggesting (maybe a video demo on a box would've been helpful). I don't even know what "topological modification" is? I looked it up on YouTube but I couldn't understand how it would exactly work in my specific problem.
I was told to use "Quadify Mesh Modifier" to smooth the face in Daz3D and when I did it the Flat face of the object created a smooth pattern to apply the shader correctly. Even the logo and text textures applied perfectly. So if this didn't solve the problem I don't know what would have.
