Thank you so much, and sorry for the late reply!
As for the program, all my models were made in MagicaVoxel, and regarding the textures, I imported the PNG file.
As you can see from the other asset packs, most of them don’t have textures, precisely because it’s not easy and it’s time-consuming.
Unfortunately, many personal commitments have kept me from posting new asset packs, but I hope to get back to it soon!