you could check the following: z3LPR:&Z
;g9:0,xT4
- if the surface/element tilt is too large ^PpFI
\,t<{p_Q
- enough analysis rays used? <7) 6*u
K7Tell\`
- have you used Coherent Data option under Detector setting. N'.+ezZ;h
j"8N)la
Someone above was right about that the non-sequential mode only uses geometric rays but you could see inteference fringes using Coherent Data.