slice_dynamic_grid (boolean, default: off) controls whether or not sampling grid is adjusted based on proximity to the camera.
slice_dynamic_grid_resolution (float, default: 3.0) controls how finely the grid is sampled (in screen pixels).
slice_grid (float, default: 0.3) controls the space of the static sampling grid.
slice_height_map (boolean, default: off) enables or disables the height map display.
slice_height_scale (float, default: 1.0) is the scaling factor for the height map.
slice_track_camera (boolean, default: on) controls whether or not the grid is maintained in a plane perpendicular to the camera and passing through the origin of rotation.