you could check the following: %?`O
.W
6,;dU-A +
- if the surface/element tilt is too large *"nN To
)-\C{>
- enough analysis rays used? CM%Rz-c
'Z*`~,Q
- have you used Coherent Data option under Detector setting. PZ>(cvX&
#My14u
Someone above was right about that the non-sequential mode only uses geometric rays but you could see inteference fringes using Coherent Data.