In any 3D program,. the Bump is a channel of the surface Shader, or Material..
It’s an image map,. so, yes you can remove it completely, or swap it out for another Bump map for that object.
Depending on what you’re exporting from Z-Brush, you’ll have the model, or the model plus a bunch of texture maps,
Look at where those maps are being saved,. and then have a look at them in an image editor, to see if there’s anything in the maps which would cause this problem.
In poser,. You can Go to the Material room,. then select the Poser surface for that area of the figure, then you should be able to see the shader list of channels, and the BUMP channel should be about halfway down.
You should be able to see what texture map is loaded, and, browse for another map for that figure,. then check what it looks like in an area render.
In Daz Studio,. you would select the figure, then go to the Surfaces tab,. look down the shader list for Bump and then adjust or change the Bump map. then check what’s changed.
Hopefully,. one of those options should help