Post Greyxed is a post-apocalyptic Resource pack Started in 2015 for a custom map. This project was never finished so all the assets are now public. The project works for the 1.12 version only and will not be updated, because many models aren't usable anymore with the new 1.13 game rendering. Feel free to use all the models for your projects
Bonus: this resource pack came with a dedicated map where you can download here:
https://www.dropbox.com/s/qkdfuyao6lssy4g/Post%20Greyxed%20%5BMAP%5D.zip