Difference between viewport and render

Hi, I’m new here.

I love a lot of things about nomad sculpt, being able to do some 3d creative stuff not sitting in my office is really nice. But I wanna finish a imagine I constantly running into the same problem:

I’m not sure if this is considered a bug. I have a hard time getting my rendered Images to look like I want. I use nomad sculpt’s postprocessing to make it look like I want it in the app, but the rendered results look very different, in many cases so much that I can’t even fix the result in external postprocessing. A added a imagine as example, it was rendered in 4K.

Am I doing something wrong? Is there a way to fix it? I would be really thankful for help (or a fix in case this is a bug.