bnuedefault uses content from...

https://www.planetminecraft.com/texture_pack/mickey-joe-s-relatively-improved-default/ Mickey Joe's Relatively Improved Default (Passive Mobs)
https://www.curseforge.com/minecraft/texture-packs/clear-glass-pack DnatorGames's Clear Glass (Self explanatory)
https://www.planetminecraft.com/texture_pack/stay-true-4447380/ Trrigg's Stay True (Bookshelf, Wheat)
https://vanillatweaks.net/ Xisumavoid's Vanilla Tweaks (3D Tiles)
https://www.curseforge.com/minecraft/texture-packs/craft-sans-square-font cyivn's Craft Sans Square Font
https://www.curseforge.com/minecraft/texture-packs/silverfish-detector Juknum'sq Silverfish Detector
https://www.curseforge.com/minecraft/texture-packs/dramatic-skys thebaum64's Dramatic Skys

designed to work with
https://www.curseforge.com/minecraft/texture-packs/newdefaultplus - SeaOfPixels's New Default+