How to download and setup Marble
Open terminal and run command
                                            git clone https://github.com/Winster332/Marble.git
                                        
                                        git clone is used to create a copy or clone of Marble 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 Marble https://github.com/Winster332/Marble/archive/master.zip
Or simply clone Marble with SSH
                                            [email protected]:Winster332/Marble.git                                    
                                    If you have some problems with Marble
You may open issue on Marble support forum (system) here: https://github.com/Winster332/Marble/issuesSimilar to Marble repositories
Here you may see Marble alternatives and analogs
spritejs tinyrenderer appleseed yii2-render-many tangram pixijs bgfx Texture rendertron webglstudio.js mapnik asm-dom rust-doom react-tv gg herebedragons Glitter phenomenon ScriptableRenderPipeline Nidium Intrinsic armory PdfViewPager ShaderGraph ogre two WickedEngine Game-Programmer-Study-Notes glumpy ascii_art