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Hi,

For some reason I can't seem to make dispersion work.
The 'Dispersion' box is checked in 'Global Material Properties', but still, nothing happens - whether I change the Abbe value or use IOR Measured Data...

EDIT:
OK, now it looks like dispersion does work when rendering, but both FIRE and Material Preview seem to ignore dispersion option for some reason

I think FIRE doesn't show dispersion, and if you have the material editor set to use FIRE instead of Production render, then it won't be visible there either