Win7, R9 280X, Catalyst 15.7.1
Broken: 2.76 RC3
Short description of error
On a subdivided cube, alpha values near 1 (like 0.999 so low transparency) are inconsistent. Some faces become completly transparent, other stay opaque (awaited behavior).
Exact steps for others to reproduce the error
Open attached file, switch between 0.999 and 1 in transparency. Some faces become completly transparent with 0.999, showing only the interior faces.
All faces are opaque with 1
Some faces stays opaque, which is good (right side) but the left side is completly transparent although alpha is at 0.999.