The use of P3D debinarizers exists in a legally gray area that is strictly governed by Bohemia Interactive’s policies:
If you are trying to or tweak the geometry of a building , you can't just open the standard game files. You first use the debinarizer to "unlock" the P3D, then bring it into Object Builder to reassign textures or move vertices. Without it, the modding scene would likely be limited to entirely custom-made assets rather than the rich ecosystem of "vanilla+" tweaks we see today. p3d debinarizer dayz