How to download and setup xacer3d
Open terminal and run command
                                            git clone https://github.com/ccaven/xacer3d.git
                                        
                                        git clone is used to create a copy or clone of xacer3d 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 xacer3d https://github.com/ccaven/xacer3d/archive/master.zip
Or simply clone xacer3d with SSH
                                            [email protected]:ccaven/xacer3d.git                                    
                                    If you have some problems with xacer3d
You may open issue on xacer3d support forum (system) here: https://github.com/ccaven/xacer3d/issuesSimilar to xacer3d repositories
Here you may see xacer3d alternatives and analogs
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