you could check the following: B.YMP;7>
2Io6s'
- if the surface/element tilt is too large 7 DY WdDX
&"[)s[m+t
- enough analysis rays used? U=kx`j>
*qPdZ
- have you used Coherent Data option under Detector setting. TX23D)CX
+5HnZ?E\
Someone above was right about that the non-sequential mode only uses geometric rays but you could see inteference fringes using Coherent Data.