2. their new version produces substantially different images compared to the old clearly we have a contradiction, which necessarily implies that they are cutting corners or have bugs in their engine. at any rate, there is consistent error in the image not due to noise (i.e. converging to different ...

90% of the noise in fry comes from the bouncing sun, where's sun in the indigo render ?
you gotta compare solid color env with mesh light or matching sun position.

http://www.kurtz-fernhout.com/press.htm

it's free for about 6 years now

I thought Thomas. An was a very techy guy with great skills, but the simple fact that he believe (or that NL let him spread that rumor to appear "higher" tech ?) that maxwell is a MLT renderer is deceiving.