Cartesian 

Note: this tab only appear if Mesh type is set to Cartesian in Meshing -> General

Cartesian mesher
These parameters control the properties the Cartesian grid meshes:

• mesher: algorithm selection:
  Scan convert: voxelize in 3D with a scan conversion algorithm
  Zmesher: developed by UGR
• Shape: From geometry or from mesh: shape obtained from the render mesh of the geometry (faster) or from an standard mesh
• Avoid degeneration: only applies to Zmesher, if set it does not create degenerated elements (quadrilateral or line elements).
• grid spacing: Uniform spacing for the whole model, or variable spacing.
• Minimum size: minimum grid spacing allowed.
• Size ratio: ratio between sizes of neighbor cells on each x, y, z direction.