Down-skin:
Hatch: Settings for the Hatch vector type. Hatches can be arranged in different patterns.
Pattern:
STRIPES: Settings for the hatch vector type that are arranged in the stripes pattern.
PARALLEL: Settings to the hatch vector type that is arranged in the parallel pattern.
CHESS: Settings to the hatch vector type that is arranged in the chess pattern.
Layer Reference: How many layers below the current layer should be used for the calculation of the Down-skins for the current layer. With a value of three, for example, the horizontal area of the current layer is compared with the horizontal area of the layer that is three layers below (nearer to the baseplate). The difference in the two horizontal areas is defined as the Down-skin for the current layer - thus all new added areas that have not been exposed below the current layer. The area that has already been exposed in the third layer and is not included in the difference is defined as the volume for the current layer.
Maximal Surface Angle: The angle of a layer of metal powder to the overlying layer of metal powder, from which this overlying layer of metal powder is recognized as the Down-skin.
Overlap: The width of the overlap area between a Down-skin and a volume. There is double exposure in the overlap area (Down-skin + volume).