transparency issue with doublesided meshes

[GoogleCodeExporter]

What steps will reproduce the problem?
1. I have multiple STL files loaded to the viewer and set double side rendering 
for all meshes to see the back side.
Initially everything is loaded and rendered good and you can see it in the 
tran1 pic. 
However once I try to change a transparency value of mesh that is rendered on 
top of another seems the latter one is bringing up front.. and the transparent 
mesh is not visible anymore.
Please see the tran2 pic. Is there anything can be done to enhance that 
behavior?
Thank you
2.
3.

What is the expected output? What do you see instead?
changing transparency shouldn't put that mesh back.

What version of the product are you using? On what operating system?
1.6.5 full release. win and linux

Please provide any additional information below.

Original issue reported on code.google.com by [email protected] on 12 Feb 2015 at 3:12

Attachments:

• tran1.png
• tran2.png