Chaos Corona Forum

General Category => Porting and API => Chaos Corona for Blender => Topic started by: Rac Leborg on 2017-05-11, 10:46:00

Title: Antialising
Post by: Rac Leborg on 2017-05-11, 10:46:00

Hi All

I'm getting some jagged edges in my renders (newbie here) and think I need Antialising. Is this available in Corona or do I need to do somethings differently? At the moment I am using the default render settings.

Thanks

Title: Re: Antialising
Post by: Pixelatedvertex on 2017-05-11, 12:36:24

hi, could you post a picture of what seems to be wrong?

Title: Re: Antialising
Post by: Rac Leborg on 2017-05-11, 13:56:41

Hi

it's just a very simple scene(for now). This issue is where the sun light hits the front of the mantelpiece base.

Thanks

Title: Re: Antialising
Post by: Rac Leborg on 2017-05-11, 14:00:14

...that's odd, the uploaded image doesn't appear to have the issue as much as the one I have on my PC? Maybe it's a resolution issue?

Title: Re: Antialising
Post by: Pixelatedvertex on 2017-05-11, 16:59:53

yeah, It's not so visible on the image here. I'm pretty new to corona myself, but the antialiasing issues you might be experiencing there are most definitely due to overbright pixels. You could try and clamp max intensity... there was a setting for that. Also, letting it render for a longer time should add more AA samples.
If all else fails, you could try to mask the jagged edges by adding bloom to you render, that's available either corona render settings, or you could do it during post-process.

Title: Re: Antialising
Post by: burnin on 2017-05-11, 17:48:24

It's obvious on the ceiling lamp ;)

Check @ Helpdesk:
1. I can see jagged edges in my rendering! (https://coronarenderer.freshdesk.com/support/solutions/articles/5000515615-i-can-see-jagged-edges-in-my-rendering-)
2. What is highlight clamping? (https://coronarenderer.freshdesk.com/support/solutions/articles/12000006462)

Title: Re: Antialising
Post by: Rac Leborg on 2017-05-11, 23:28:57

Thanks Pixelated and Burnin for the responses and advice.

Funnily enough I hadn't noticed it on the ceiling lamp even though, as you say, it's obvious.

Highlight clamping? Is it the same as highlight compression?

(edited) Any chance of being able to see the tutorial vid in FULL SCREEN, as it is too small on my PC to see what is going on.

Cheers

Title: Re: Antialising
Post by: blanchg on 2017-05-12, 00:46:16

If you right click the video you can get the url and watch it on youtube/fullscreen
Clamping is called Max Sample Intensity in the Corona Render Settings.

Also filtering may help

Title: Re: Antialising
Post by: maru on 2017-05-12, 17:47:13

(in 3dsmax ui)
VFB > Highlight compression
Performance > Max Sample Intensity
System > Highlight clamping
Are 3 different things. :)

Ideas to get rid of jagged edges:
-Reduce the Exposure.
-Increase the Highlight compression.
-Increase Filmic highlights.
-Use Blurring in Corona VFB.
-Use Bloom and Glare
-Use Highlight clamping.
-Render the image at a higher resolution and then scale it down.

Also lowering GIvsAA balance can help render an image with better antialiasing, but lower GI quality in the same render time.

Title: Re: Antialising
Post by: Rac Leborg on 2017-05-12, 19:24:55

Maru, thanks. That's really helpful - I will get practicing!