apply a large plane to a complicated object for 3D printing


Im modeling this gun to 3D print and I modeled it with the mirror modifier so i can print the same half twice then glue it together to get a full gun. I’m not sure how to go about making the side of the model flat. Basically right now it’s a big shell.

what I have


What I want



everything red to be a flat plane so it prints nicely. What would you guys do?

Hi TheChosenHero,

Add a simple Plane with Intersection Boolean Modifier: