pota
                                Polynomial optics to Arnold. Camera shader with high-order aberrations, including bidirectional filter that adaptively samples out-of-focus highlights.
                            
                        How to download and setup pota
Open terminal and run command
                                            git clone https://github.com/zpelgrims/pota.git
                                        
                                        git clone is used to create a copy or clone of pota 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 pota https://github.com/zpelgrims/pota/archive/master.zip
Or simply clone pota with SSH
                                            [email protected]:zpelgrims/pota.git                                    
                                    If you have some problems with pota
You may open issue on pota support forum (system) here: https://github.com/zpelgrims/pota/issuesSimilar to pota repositories
Here you may see pota 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