you could check the following: la!1[VeL
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- if the surface/element tilt is too large 7r:nMPX
2{jtQlc
- enough analysis rays used? F&>T-u-dog
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- have you used Coherent Data option under Detector setting. n-L]YrDPK[
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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.