Hello, i am a beginner and i try to use gem. I can't use "text3d", this is not a problem of color black on black. I succed in creating a new gem windows and making rotate cubes. In the helpfile this is indicated that it could be a problem of rendering ON or OFF.
How can i switch rendering with linux (i am a beginner with linux too) ? Is it the only problem.

Thanks

PS: sorry for my bad english