Problem with refractive IOR V-ray

[filibis]

@andrtzej91

however, after going through three layers of glass

Do you have 3 layers of 10 cm thick glass (total of 30 cm)?

@andrtzej91

‘Max trace depth’ in the advanced section of the render options from 5 to 15 (wich I believe is the option that controls how many reflections/refractions one lightray is calculated)

According to Vray Docs:

Max Trace Depth – Specifies the level to which all bounces that will be computed for reflections and refractions are clamped.

@andrtzej91

I can finally sea the beautiful turquoise sea even through as many as six layers of glass, with one caveat.

You seem to solve your problem via max trace depth , what is the caveat/problem?

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Also here is the text that displays when you hover over ‘Max Trace Depth’ option:

So i assume when you increase this parameter, it overrides/surpasses IOR settings.