Double buffering display option creates graphics problems with OpenGL driver
When using OpenGL driver and Double Buffering display option, zooming in and out leads to
"white-band" on the sides of the graphics window and heavy flickering.
Three possible workarounds:
1. At the operating system prompt, set the following environment variable
setenv HOOPS_DRIVER_OPTIONS "double-buffering"
The problem will dissapear even when using OpenGL driver.
2. Change the driver to "x11"
(2a) when starting FLUENT with the line command option
fluent 3d -driver x11
(2b) within FLUENT session with the TUI command
and then close all graphic windows and re-display.