While I would love that to be the case, I don’t think it is that simple. Java edition, at least, has been experimenting with shader-like features in resource packs for a while now. It could be that Luanti convinced them it needs to be built in and not an extra pack, but I think it is at best parallel ideas, or at worst, Luanti taking inspiration from those shader-like packs and trying to do better not even knowing they are doing the same process as Minecraft.
While I would love that to be the case, I don’t think it is that simple. Java edition, at least, has been experimenting with shader-like features in resource packs for a while now. It could be that Luanti convinced them it needs to be built in and not an extra pack, but I think it is at best parallel ideas, or at worst, Luanti taking inspiration from those shader-like packs and trying to do better not even knowing they are doing the same process as Minecraft.