how to make the model box unchanged and the resolution better?

I used triansform.prescale, The box of the model is bigger and the voxelCount is bigger.
But how to make the model box unchanged and the resolution better?

math::Transform::Ptr xform = math::Transform::createLinearTransform(1);
xform->preScale(Vec3d(0.5, 0.5,0.5));
auto grid=meshToSignedDistanceField(*xform, points, triangles, quads,100.f,100.f);

Start with the meshToSignedDistanceField call and the math::Transform::preScale usage shown in the issue. Check the relevant OpenVDB documentation and implementation to understand how transform scale affects the model bounds, voxel size, and voxelCount. Done means providing a documented way to improve resolution while keeping the model box unchanged, or clarifying that the requested combination is not supported.

Written by the indexing model from the issue text.