I'm having an issue with JSTR. The texture pack will load the vanilla textures, but Mod specific ones do not load (as in not a single texture from Mods). If you look here a biome tree texture is not loading, as is the IC2 textures and the chests. This is the latest JSTR from curseforge. Thumbing through the files in the resource pack, and everything is there. FTB just doesn't want to load them.
Not sure what to do.