Files

The “Solid Back” is Lau85's case with the solar system slots removed. 

The ”Solid Back - Ribbed"  is is Lau85's case with the solar system slots removed along with the banded texture from tato's banded case scaled to fit. There are two files, 0.5 and 0.3. This is the depth of the ridges. Use whatever looks right in your slicer, as this depends on your layer height. 

License 

Using “Samsung Galaxy S8 Case with Solar Sytem” by Lau85, licensed under the Creative Commons - Attribution license.

Using “Samsung Galaxy S8 Active g892 case” by @tato licensed under the Creative Commons - Attribution ShareAlike