Blazified If you want to upload this, then go ahead. It works fine. I spawned every Axolotl vanilla and MAVM. All bucket textures work. I don't use Optifine, but it'll work fine on Optifine. I use CIT Resewn, and it works great. You need either Optifine or CIT Resewn for this to work. Optifabric may work, but I hear it is at least a little buggy.
Known Bug: Baby buckets are the default texture instead of the proper texture. I don't know if they work in Optifine, but it is a bug in the original code by Blazified and nothing of my doing.
I also fixed it not showing up, I messed up pack.mcmeta in the original upload. If you downloaded in the first ~30 minutes of it being up, please redownload the texture pack or replace the pack.mcmeta with a working one.