How to download and setup unity-graphics
Open terminal and run command
                                            git clone https://github.com/Delt06/unity-graphics.git
                                        
                                        git clone is used to create a copy or clone of unity-graphics repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with unity-graphics https://github.com/Delt06/unity-graphics/archive/master.zip
Or simply clone unity-graphics with SSH
                                            [email protected]:Delt06/unity-graphics.git                                    
                                    If you have some problems with unity-graphics
You may open issue on unity-graphics support forum (system) here: https://github.com/Delt06/unity-graphics/issuesSimilar to unity-graphics repositories
Here you may see unity-graphics alternatives and analogs
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