Hey there.

I'm using a resource pack known as "Goribby's 3D", and when I use it on 1.12.2, all the blocks made 3D show the black and purple square grid.

This pack isn't supported with 1.12.2, but I would really like to use it on that version,

To be more clear, I have no other resource packs enabled, and I use Forge installed w/ Optifine, I use the mod "More Player Models".

I've tried to talk with the creator of the pack, but he can't edit it anymore because the new version of Minecraft runs a software his laptop can't process.

If any resource pack specialist can show me how to do it manually or do it for me, it would be much appreciated.

Thank you!