Visual artifacts in Orthographic

[GoogleCodeExporter]

What steps will reproduce the problem?
Compile and run the orthographic program

What is the expected output? What do you see instead?
I expect to see a hollow tubelike box. Instead I see a hollow tubelike box with 
some added artifacts.
See attached picture


What version of the product are you using? On what operating system?
Ubuntu 12.04. Radeon HD 4850 with proprietary drivers.

Please provide any additional information below.
The artifacts usually don't appear until i try to rotate the tube. The 
artifacts are different each time i run the program.

Original issue reported on code.google.com by [email protected] on 10 May 2012 at 7:26

Attachments:

• [Skjermdump fra 2012-05-10 21:17:39.png](https://storage.googleapis.com/google-code-attachments/oglsuperbible5/issue-43/comment-0/Skjermdump fra 2012-05-10 21:17:39.png)