Blanking is the operation of representing missing or invalid data in a data set. This is fully supported in the point sets and lattices. Lattice nodes are commonly blanked in the Gridder module when the search criteria are not met; in Filter edge handling; and when a smaller input lattice is resampled to a larger output lattice (in which nodes outside the input lattice extents are blanked).

Blanked nodes are not displayed in output modules; however, they are written to exported data files if the export format supports them. For example, if a Surfer . GRD file is exported, the internal blank nodes within Voxler are converted to Surfer grid blank values in the output file.