How to define command for entry in Gnome menu?

[Hiisi]

Dear List!
On my system I have to start Blender using 'LIBGL_ALWAYS_SOFTWARE=1
blender'. Otherwise it's impossible to work in it. I set up an alias
in .bashrc and it works well from command line. However if I start
Blender from Application->Graphic->Blender the alias doesn't work. I
thought menu entries in Gnome are using the same commands as if I've
typed them manually in terminal. Am I wrong here?
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Hiisi.
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