option to turn off denoise in IR

Sorry if this has already been answered but is it possible to disable denoise completely from IR in corona 3? I have a lot of grasses and it just looks blurry and I need to see the detail quicker, even if it’s noisy. Thanks!

See checkbox at

Render Setup → Performance → Performance Settings → Interactive Rendering → “Fast preview denoise during render”

Good Luck

Thank you!