https://codesandbox.io/embed/387z7o2zrq https://codesandbox.io/s/r3f-instanced-colors-8fo01?file=/src/App.js:396-431 https://jsfiddle.net/juoz5yLv/1/
// lines https://codepen.io/prisoner849/pen/XWKYLqW?editors=0010
// inst + shaders
https://medium.com/@pailhead011/instancing-with-three-js-part-3-a3fe15bcee3a https://github.com/pailhead/three.js/blob/instancing-tutorial/examples/webgl_interactive_cubes.html