Do I need TerraFarm?

Yes. Both Mining Layers and Dig With Anything build on TerraFarm by scfmod.

TerraFarm is a separate mod under its own licence. We neither ship it nor redistribute it — you get it from where it comes from.

What our mods do sits on top of that:

• Mining Layers decides which material sits at which depth.
• Dig With Anything makes the machines you already own TerraFarm-capable, without you editing files.

Without TerraFarm there is no terrain deformation — and so nothing for these two to build on.