Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Feature Requests => [Max] Resolved Feature Requests => Topic started by: romullus on 2014-03-21, 00:47:32

Title: MB segments count
Post by: romullus on 2014-03-21, 00:47:32

Keymaster, could you rise limit for motion blur transformation segments? From my experience, more segments adds close to nothing to render time, but could tremendously improve mb in certain situations. Something like 200 or even more would be great.

Title: Re: MB segments count
Post by: Ludvik Koutny on 2014-03-21, 01:40:39

It may not add rendertime, but it adds a bit of memory consumption, especially as scenes grow more complex. The limit is there so that people do not overshoot the setting... You are doing quite extreme cases of motion blur...  which is great for tests...  but not sure how it could pay off in common scenarios...  if it would really be worth the vulnerability introduced by raising the limit :)

Title: Re: MB segments count
Post by: romullus on 2014-03-21, 02:04:52

I see your point. Then, maybe there is possibility to expose that value in corona config files, that only more experienced users could change it if they need it?
I'm not doing anything  extreme, i just want to capture propeller of airplane, that spins on high rpm. From distance it looks ok, but in close up shots, even 50 segs is just not enough.

Title: Re: MB segments count
Post by: romullus on 2014-03-21, 13:02:21

To reinforce my request, i'm attaching simple example of what i doing. I would say it's nowhere close to extreme and additional segments would be very beneficial in that scenario, i think.
Although i should say, it's miles better than i can achieve in scanline or mental ray, but there's no limit for perfection ;]

Title: Re: MB segments count
Post by: Ondra on 2014-03-21, 13:16:20

I will increase the limit

Title: Re: MB segments count
Post by: romullus on 2014-03-21, 13:18:32

Thank you very much!

Title: Re: MB segments count
Post by: Ludvik Koutny on 2014-03-21, 13:58:20

Yup, this is fair example :)

Title: Re: MB segments count
Post by: Ondra on 2014-03-23, 22:40:44

increased to 64/128, hope it is enough ;)

Title: Re: MB segments count
Post by: maru on 2014-03-24, 10:40:11

How about increasing max GI samples limit? Or at least an option to override it, I suppose I know why it's there. ;)

Title: Re: MB segments count
Post by: Ondra on 2014-03-24, 11:25:02

ok, increased.

Title: Re: MB segments count
Post by: romullus on 2014-03-25, 15:56:48

Arrrgh, i feel so embarrassed. Rawalanche was totally right, there was no need to increase count of mb segments at all. It is not Corona's fault, but max's. I did not take into account that animation in 3ds max is discrete. So, i lowered speed of motion and increased shutter speed to compensate for that and i get butter smooth motion blur, even with default segments count (16).
Shame on me.