Mask two points enlargement factor. Enlarges the mask box by adding two points at the edges of the box in each direction (x,y,z) at a distance L=Lb*PESMask2PEnlargeFactor where Lb is the box size. This allows to run simulations with an additional void space at a price of adding few points. The Fourier space associated with the new box is restricted by the same factor.
Note: needs PESMaskPlaneWaveProjection = nfft_map or pnfft_map .