The lattice cells should be ideally cubic and the beams connect end all at the same locations on all edges. Since you create an array in xyz. They ideally should connect in all directions.
Depending on the size of your object and the complexity you should adapt the voxel size accordingly. Too small will create processing problems. Too large won't create a properly resoluting object. The resolution of curve to points also has to be the right amount to avoid gaps between the volume/ voxels. The radius should be larger than the voxels and the curve split.
I've been working on something similar, but never thought to do 'curves to points'. Is this the most responsive method you've found?
I just think merging the volume based on points is a good way. But open to hear if there is a better approach.
how and what Lattice cell can be? how to design and model perfect lattice cell so it can use in mentions work flow?
The lattice cells should be ideally cubic and the beams connect end all at the same locations on all edges. Since you create an array in xyz. They ideally should connect in all directions.
what deal with voxel size for each node and Radius in "Points to Volume", could you share something on this?
Depending on the size of your object and the complexity you should adapt the voxel size accordingly. Too small will create processing problems. Too large won't create a properly resoluting object. The resolution of curve to points also has to be the right amount to avoid gaps between the volume/ voxels. The radius should be larger than the voxels and the curve split.