Chrome reflections not visible when behind a sheet of glass

[tricky]

I have a relatively straightforward scene with a staircase in an office. The upstands of the glass (the balustrade) is glass at 8mm thick. Running around the glass balustrade is a chrome/stainless steel handrail - a sweep object with a circular profile. It mostly looks fine except where the stainless steel handrail goes behind the glass: the view of the handrail goes black behind the glass.

I have tried changing all sorts of values without success. Any ideas? This should be simple so clearly I am tired!!

[Raven]

Sounds like a reflection/refraction depth problem.
Are the materials at default, or have you got the override in the render panel set?

[rikou]

yes, I'm pretty sure that Raven is right, start with checking your reflection/refraction depth

[tricky]

I've upped the figures for refl/refr on the glass to 20 and refl on the chrome to 20. Doesn't seem to make any difference.

[tricky]

Override depth was on!!!!!!!

[kosso_olli]

Hehe, classic