you could check the following: Q Zv}\C-c
y{Vh?Z<E
- if the surface/element tilt is too large L=wpZ`@
y
l'
2C/#8F
- enough analysis rays used? Z,7VOf6g
}0~X)Vgm(
- have you used Coherent Data option under Detector setting. |ZtNCB5{^j
'mO>hD`V
Someone above was right about that the non-sequential mode only uses geometric rays but you could see inteference fringes using Coherent Data.