you could check the following: b,'rz04^
Hl*#iUq
- if the surface/element tilt is too large ,dFY]
v[R_6
- enough analysis rays used? \jS^+Xf?^
CK_\K,xVT
- have you used Coherent Data option under Detector setting. :qV|rih_Q
4VkJtu5
Someone above was right about that the non-sequential mode only uses geometric rays but you could see inteference fringes using Coherent Data.