Ho...yeah!

Luxrender....for what I've tried some times ago it's a snail :)

Terrific photorealistic results but unless you have tons of cores or a super powerful CPU (like xeon)....
Maybe with a Tesla or even with a "consumer" Gtx 1080 Ti like mine, the results could be a little better but...

Life's too short to see a gauge bar reaching its end :)

Ciao!