the idea is that locking the noise pattern is an OPTIONAL feature. Sometimes, it really looks much better than temporaly uncorrelated noise. Just set random seed to 0 and you have uncorrelated noise every time ;)
Yeah, I'm all for having it as an option. Just make sure it defaults to off. :) In modo, it defaults to on and sometimes I forget to turn it off. Mumble, grumble.
Actually, i hope it remains on by default. Static noise is a lot less distracting than a moving one, especially on very thin lines, where it can make hell once you have your sequence rendered and realize you wanted to turn it on. In production, a lot more people will want to get pictures as clean as possible, rather than rely on postprocessing denoising.
