I don't maintain Sculptgl anymore (except small/minor fixes).
You can try it here.
Additional information can be found on the website.
Nodejs needs to be installed nodejs.
Then for the browser build :
yarn # npm install
yarn dev # npm run dev (npm run release for final build, npm run website should not be used)
// visit app/index.html
For standalone :
yarn add electron
yarn add electron-packager
yarn standalone
The raw environments are from https://hdrihaven.com/hdris