Corona auto-blurring high-density foliage

Corona Corona for 3ds Max Help Required
1

Hey all,
I need some help here. I’m modelling a 3D environment for a project my partner is doing, and I’m onto the final renders/post, but I’ve hit a snag.
I’ve got a gate with some ivy on it, and when I render the environment the foliage looks great for the first few passes, but then Corona automatically blurs it BIG TIME and suddenly, like a filter is being applied?
The object in question;

mM1DRzl.jpg
mM1DRzl.jpg722×661 68.1 KB

The render;

pnOHzvE.jpg
pnOHzvE.jpg878×792 145 KB

The issue is especially apparent in the leg on the right- you can see some individual leaves, but then Corona just smashes the rest of them together in this blurred mess.
Is there any way I can tell Corona not to do this? Any fast replies appreciated, our deadline is super close.
Cheers!

2

Is this interactive rendering or a regular one? Is denoising turned on?

3

Oh wow total noob mistake there, it totally doesn’t blur in actual renders. Sorry, I’ve only been using Corona a few weeks! Embarrassed now haha

4

No need to feel embarrassed, Corona is very simple to use renderer, but no one can know everything at first :] Just so you know, it is possible to turn off denoising in interactive rendering too - just go to render setup>performance tab and uncheck fast preview denoise during rendering.

5

Yep, that’s denoising: https://coronarenderer.freshdesk.com/support/solutions/articles/12000053263