Tier zero materials are essentially "transparent" when it come to creating runes, and are usually treated like Air (which is a tier 0 block itself.) Any run pattern that shows blank space can typically have any tier zero material in those empty spaces.
Tier Zero is comprised of:
- Air (All dimensions)
- Grass Blocks
- Grass (the plant)
- Dead Bushes
- Concrete (and concrete powder, all colors)
- Signs (freestanding and walls)