Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: cecofuli on 2020-09-01, 01:34:58

Title: v6.0 BUG - CScatter objects disapper in IR when using animated camera
Post by: cecofuli on 2020-09-01, 01:34:58

Hello,

When I watch the CScatter objects through an animated camera, randomly, in some frames they disappear.

So, open this file, enable IR and scroll the timeline => the CScatter objects, sometimes, disappear.
No problem with v5.0.

I think it's a bug

Thank you  )^__^(

Title: Re: v6.0 BUG - CScatter objects disapper in IR when using animated camera
Post by: rowmanns on 2020-09-01, 09:09:39

Hi Francesco,

I am trying to reproduce this.

Do you mean that all of the scattered instances disappear?

For me it looks as though the scatter is recomputing which is why the instances disappear for a moment and reappear when you stop scrubbing the timeline.

Thanks,

Rowan

Title: Re: v6.0 BUG - CScatter objects disapper in IR when using animated camera
Post by: rowmanns on 2020-09-01, 10:47:05

Hi,

So I have spoken with our dev team.

This behaviour is a side effect of some scatter optimisations that we did and is expected.
There is now a small delay which waits to see if there is another recomputation request while dragging the timeline. This stops the 3ds Max UI getting "locked up" in heavier scenes and overall improves the scatter performance in IR.

Thanks,

Rowan

Title: Re: v6.0 BUG - CScatter objects disapper in IR when using animated camera
Post by: cecofuli on 2020-09-01, 16:13:40

Hi rowmanns

Mmm...  honestly I thought the same, but it's a annoying...
I think you should add a checkbox to enable/disable this feature... now, IR isn't "IR" at all...

Open my test scene an press the two buttons   <  and > in the timeline.
Every frame, the scattered objects disappear/appear...

With v5.0, CScatter was much better in my opinion :/

EDIT:
Look the video: using v6.0, the IR is not pleasant at all... Every frame, we have a refresh...

Also, this is a bug: if I press the PLAY button and then STOP, sometime the scattered objects are not rendered.
You can see the problem at 1min 11 sec.

Title: Re: v6.0 BUG - CScatter objects disapper in IR when using animated camera
Post by: rowmanns on 2020-09-02, 15:53:54

Hi,

We did some more investigation and did uncover an issue here.

We will look into it further and hopefully get it into a hotfix.

Cheers,

Rowan

(Internal ID=559194494)

Title: Re: v6.0 BUG - CScatter objects disapper in IR when using animated camera
Post by: cecofuli on 2020-09-02, 16:00:18

Hi rowmanns,

glad to be  helpful =)

Title: Re: v6.0 BUG - CScatter objects disapper in IR when using animated camera
Post by: rowmanns on 2020-09-17, 11:29:21

Hey Francesco,

We have fixed this bug in the first v7 daily build, it will also be included in v6 HF1.

Daily build: https://forum.corona-renderer.com/index.php?topic=30876.0

Cheers,

Rowan