nostr:npub17wr3a23a9dmvpes8xwgu4nv8034zg60t0x7n2dq8vwtd0mp0v2sq96prsu there was a scultping prototype called kizamu which used those. i might have the paper somewhere. they stored stuff in trees that split when there was too much gradient error.

adaptively sampled distance fields don't help with voxel sculpting though.