Chaos Corona Forum

Chaos Corona for Cinema 4D => [C4D] Bug Reporting => [C4D] Resolved Bugs => Topic started by: Redeemer on 2018-09-03, 12:01:29

Title: Hair won't render
Post by: Redeemer on 2018-09-03, 12:01:29

Hi there!

I did a global search on the forum about this issue, couldn't find anything similar.

I have a fabric object that I want to have hair. Setup was pretty straighforward and renders also quite fast in the viewport (after 17 seconds it starts rendering - 2 hair objects, 700000 hairs in total).
The problem is that as soon as I want to render the image in the picture viewer, it hangs on the first stage 'preparing'. I've let it prepare for more than one hour, but doesn't do anything. It neither crashes, I'm still able to stop the render and quit the picture viewer.
Deleting the hair objects and inserting new hair objects with a lower hair count (initial - 5000 hairs) has the same problem. Renders fine in the viewport, nothing happens in the picture viewer.

Title: Re: Hair won't render
Post by: Beanzvision on 2018-09-03, 13:00:04

Hi there, can you share your scene file with us? Our private uploader is linked in my signature below. Thanks ;)

Title: Re: Hair won't render
Post by: Redeemer on 2018-09-03, 15:43:59

Thanks,

I've uploaded the scene file: AKG_K271MK2_Corona.zip through the uploader.

Title: Re: Hair won't render
Post by: Nikola on 2018-09-10, 16:38:11

Hi,

Thank you for the scene. Rendering stucks in "Preparing" phase what is Cinema phase and Corona hasn't been started yet. You can observe the same problem at Standard/Physical renderer, but I noticed that you have a strangely high count of hair guides, please decrease the count of hair guides to much smaller value and use hair count instead to set the density of rendered hair.

Best regards
Nikola

Title: Re: Hair won't render
Post by: Beanzvision on 2018-09-10, 16:48:02

Confirmed^^^ Reducing the guides to less than 500 triggered the render almost instantly.

Title: Re: Hair won't render
Post by: Redeemer on 2018-09-12, 08:31:58

Quote from: Nikola on 2018-09-10, 16:38:11

Hi,

Thank you for the scene. Rendering stucks in "Preparing" phase what is Cinema phase and Corona hasn't been started yet. You can observe the same problem at Standard/Physical renderer, but I noticed that you have a strangely high count of hair guides, please decrease the count of hair guides to much smaller value and use hair count instead to set the density of rendered hair.

Best regards
Nikola

Thanks Nikola,

So nothing Corona related, sorry about that. I've reduced the amount of guides and renders fine now. Must be the high number of polys why Cinema put so many guides there.