you could check the following: (06Vcqg
MLD>"W
- if the surface/element tilt is too large s@)"IdSA(
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- enough analysis rays used? 0.BUfuuh
BUA6(
- have you used Coherent Data option under Detector setting. Sd<@X@iU8D
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Someone above was right about that the non-sequential mode only uses geometric rays but you could see inteference fringes using Coherent Data.