This mod is basically an upscaled version of the original textures with minimal changes. I don't mind other authors using these textures, but you might want to ask Xevawolf, the author of the original Xeva Body Pack mod.

Thank you! The original author has written in their mod description "The content of this mod is open for public use. You can freely use, modify, and distribute it without needing my permission, nor do you need to mention that I am the author." I'll mention you both, of course :)