# I can't using ' Fast preview denoise during render "

**URL:** <https://forums.chaos.com/t/i-cant-using-fast-preview-denoise-during-render/150532>\
**Category:** Help Required\
**Created:** [May 7, 2021, 5:42am UTC](https://forums.chaos.com/t/i-cant-using-fast-preview-denoise-during-render/150532 "2021-05-07T05:42:45Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![studentvn](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@studentvn](https://forums.chaos.com/u/studentvn)\
**Post date:** [May 7, 2021, 5:42am UTC](https://forums.chaos.com/t/i-cant-using-fast-preview-denoise-during-render/150532/1 "2021-05-07T05:42:45Z")

</div>

Hi everyone,  
My fastpreview is not working

My PC : AMD Ryzen 2700X, VGA NVIDIA 1060 6G

Please help me.

---

<div class="post-metadata">

**Author:** ![wilbertvandenbroek](https://avatars.discourse-cdn.com/v4/letter/w/b5a626/32.png) [@wilbertvandenbroek](https://forums.chaos.com/u/wilbertvandenbroek)\
**Post date:** [May 7, 2021, 7:21am UTC](https://forums.chaos.com/t/i-cant-using-fast-preview-denoise-during-render/150532/2 "2021-05-07T07:21:50Z")

</div>

You should be more specific. I once didn’t actually install the denoiser when I couldn’t find it. Check if that is the case first by custom installation option.

---

<div class="post-metadata">

**Author:** ![tom\_grimes](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/tom_grimes/32/52842_2.png) [@tom\_grimes](https://forums.chaos.com/u/tom_grimes)\
**Post date:** [May 7, 2021, 11:23am UTC](https://forums.chaos.com/t/i-cant-using-fast-preview-denoise-during-render/150532/3 "2021-05-07T11:23:52Z")

</div>

Yes, more specific is required - which version of Max, which version of Corona, what is meant by not working (is there an error message, if so please share what the message is; does it simply “not seem to do anything”; is this every scene or just particular ones?); a screen shot of your settings just so we can check you have them set up right; was it working in another version of Corona and then stopped?

Thanks!

---

<div class="post-metadata">

**Author:** ![maru](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/maru/32/15975_2.png) [@maru](https://forums.chaos.com/u/maru)\
**Post date:** [May 7, 2021, 12:15pm UTC](https://forums.chaos.com/t/i-cant-using-fast-preview-denoise-during-render/150532/4 "2021-05-07T12:15:27Z")

</div>

Have you tried following the solutions here? [https://coronarenderer.freshdesk.com/support/solutions/articles/12000048205-failed-to-initialise-optix-denoiser](https://coronarenderer.freshdesk.com/support/solutions/articles/12000048205-failed-to-initialise-optix-denoiser)