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

/display/set/rendering-options/driver x11

and then close all graphic windows and re-display.

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