Is there a way to let fast preview denoise off by default?
This is very anoying.
Yep, make a new max template with your own corona settings.
Turn off IR denoiser, set any other render setting you would like to have as default, then go to render setup>system>system settings and make sure that enable dev/debug mode is activated, then go to performance tab, expand dev/experimental rollout and press save defaults button.
Thanks for this.
Will give it a try.
It also works well with a custom maxstart file 