This is a case for the iPhone 15 Pro Max that I designed to print in TPU. I printed the camera guard piece in both TPU and PETG and both work well. The case would probably work in a stiffer filament, but I've only tried TPU.

There is a version with open buttons or covered buttons. I think he option with covered buttons prints a little better because the only bridging is relatively short over the plug and speakers at the bottom of the case, but the covered button option requires a lot more retractions. 

The back of the case is thin enough to work with wireless chargers and a MagSafe wallet. I haven't tried any MagSafe chargers or stands that hold the phone up.

I like to print just 1 bottom layer to let the infill show through a little. This works great with TPU but might not with other filaments.

Take note while assembling that the camera guard is not perfectly square. The longer edges should run vertically, parallel to the longer edges of the phone.