Thank you. I believe I've resolved the issue. Although I haven't tested it on my main project yet, I'm confident it will work.

By using trim instead of projection, I managed to create an indented design.
I realized my mistake was performing a boolean operation on the "Joined srf" which was obtained by the trim operation. By keeping a copy of the solid and performing the boolean operation on that, I was able to get a solid.

Since I was able to get a 'Solid', I shouldn't have any issues with the orientation of the faces anymore. I will confirm this in my upcoming checks.

Hi marzRX, yes if you form your object as a closed solid then it will automatically orient the normals towards the outside of the solid.

Usually it is easiest to cut a solid using boolean difference with another solid as the cutting object instead of Trim. Trim is more of a low level operation, booleans are kind of like a batch mode where they combine trimming and automatically discards pieces based on what volume they are contained inside of and then automatically joined as well.

- Michael

Thank you, Michael. I was able to create it.
I wondered if I could represent a design from a certain Photoshop tutorial on YouTube in 3D, so I decided to give it a try.
https://www.youtube.com/watch?v=LMIb0K96uYE



MoI is a savior for me. The results that can be obtained through study are excellent, making the whole process very enjoyable. ;)