you could check the following: pF"IDC
PK*
$
- if the surface/element tilt is too large ub]
w"N
7e&%R4{b
- enough analysis rays used? Zx]"2U#
K<+h/Ok
- have you used Coherent Data option under Detector setting. 3^zOG2
) 4'@=q
Someone above was right about that the non-sequential mode only uses geometric rays but you could see inteference fringes using Coherent Data.