you could check the following: `'Ta=kd3
L:YsAv
- if the surface/element tilt is too large A`(p6 H"s
Te'^O,C)y$
- enough analysis rays used? j-gLX
{#QFDA
- have you used Coherent Data option under Detector setting. 3FUZTX]Q1
f<SSg*A;
Someone above was right about that the non-sequential mode only uses geometric rays but you could see inteference fringes using Coherent Data.