Hi guys,
I am relatively new to all this but am trying as a first attempt, to 3D print my sisters 3D baby scan.

So I managed to convert the jpg file to an STL using embossify.com.
The issue I am having is surrounding the baby face, the corners are raised to same level as the face.

I have tried looking all over for software that will allow me to reduce that specific area or even crop the baby face away from it but to no avail.

Is there any advice anyone can pass over to me on this?