I actually use Clarisse and while it show you quite adequate interactive preview together with de-noiser and the soft is quite simple and convenient the final render of acceptable quality is taking so long you need a render farm. I'd wish to trade off some of its cool features for something GPU based Hoped maybe Redshift…
Every modern render has interactive view but once you do something really complex of gazillion of instances like rocks covered with actual 3d moss tiny sprouts or grass or a mountain landscape with trees, somthingr scattering and transmitting light through all the interactive renderers I tried turn into ugly mess of pixels…