The 0.1 limit was too large. The issue with making it smaller is that one can easily crash blender by making it to small. To counteract this, the step has been reduced as well. A voxel size/amount of 0 disables the modifier.
make format
BKE_mask_copy_nolib()
BKE_mask_free()
BKE_id_copy_ex
eMeshBatchDirtyMode
BKE_<id_type>_copy