Butterfly meshing "pattern"

when I am trying to similate an indoor case with butterfly, I notice the mesh “pattern” were actually based on the overall bounding box for my wall geometrys and divided by 10, which result a rectangular shape as shown in the attached image.
which setting can I play with to result a mesh pattern like 1.75 x 1.75 (square pattern)?

You can set the number of divisions in each direction xyz to _cell_count_ in Butterfly_blockMesh. You can input nx,ny,nz in the panel, or specify the same in point or vector.
Note that this division is for a bounding box, so you can get the vertices of the bounding box with the block_pts of Butterfly_caseFromGeos.