you could check the following: 9M /SH$Qy
=rd|0K"(r
- if the surface/element tilt is too large 8LI-gp\ 2
8$c bVMjh
- enough analysis rays used? `T2$4 >!
S/`%Q2za4
- have you used Coherent Data option under Detector setting. <|*'O5B
x-'~Bu
Someone above was right about that the non-sequential mode only uses geometric rays but you could see inteference fringes using Coherent Data.