Transparency multiplying

Hi All,

I am looking at an issue with view transparency that someone may have come across before and have a solution.

In this example we have a bridge with a slightly transparent floor (say 10%) refer to Trans1.jpg

If we change the balustrade to have a transparency of say 90% the floor also takes on this level of transparency where the two overlap?

Is there a work around for this phenomenon?

This looks to appear the same in AECOsim ss6 (08.11.09.875) and Connect (10.00.00.118)

Thanks

Wayne