How to download and setup shader-threejs
Open terminal and run command
                                            git clone https://github.com/demaxism/shader-threejs.git
                                        
                                        git clone is used to create a copy or clone of shader-threejs 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 shader-threejs https://github.com/demaxism/shader-threejs/archive/master.zip
Or simply clone shader-threejs with SSH
                                            [email protected]:demaxism/shader-threejs.git                                    
                                    If you have some problems with shader-threejs
You may open issue on shader-threejs support forum (system) here: https://github.com/demaxism/shader-threejs/issuesSimilar to shader-threejs repositories
Here you may see shader-threejs alternatives and analogs
gpu.js pixijs HTML-GL yasea js Blotter StarWars.Android gl-react glsl-optimizer glslViewer Wagner THREE.MeshLine fieldplay RenderPipeline PixelFlow polygon-shredder shaderc ShaderEditorExtension regl-cnn vulkan_minimal_compute hlsl2glslfork ShaderSketches wireframe-world webclgl curtainsjs ShaderEditor Bonzomatic ouzel gl-transitions Partikel_accelleration_on_GPU