you could check the following: | Pqs)Mb]
Li+|%a
- if the surface/element tilt is too large bYYjP.rcF
Jw^h<z/Ux
- enough analysis rays used? ?lm<)y?I7+
\==Mgy2J8
- have you used Coherent Data option under Detector setting. ;\]DZV4?)r
= gcZ RoL
Someone above was right about that the non-sequential mode only uses geometric rays but you could see inteference fringes using Coherent Data.