Special thanks to Mr1k3 for starting this idea, and the credit goes to him for coming up with a solution for accomplishing it which I might not have ever considered. It led me to mimic his idea when I polished up his NoMolding mod. That of using Flint to represent Tool Molds, which I copied by requiring Soil for the Flower Pots and Planters. 

The basic idea of this mod is not to remove Clay Modeling, but to give the option to use more resources instead. You can either take the time and effort to dig up larger amounts of Clay, or you take the time to make them voxel by voxel and save on clay. And maybe you make that choice based on simply not finding enough Clay deposits within reach. Or you choose to do manual Molding because you genuinely enjoy doing it, and the savings on resources is just a bonus. 

So it's not just the number of voxels, it's how complicated the overall recipe is. The Clay Planter and Flower Pots, for instance, have no lids, and are basically just two layers, because you can repeat layer 2 all the way till it's finished. Besides that, they're just cosmetic items anyway, so there's not as much sense of necessity as Storage Vessels or Crocks, which should cost more for multiple reasons. 

I didn't include the option of Fire Clay, except the Shingles, because it is too useful for Bloomeries and other future items which Blue Clay can't be used for. 

Suggestions are welcome, but I feel I've calculated the most reasonable amounts based on the required resources, and how much time it would have taken to do the work manually.

See the Forum Post for more details, including the math I used to determine these amounts.