Chaos Corona Forum

Chaos Corona for Cinema 4D => [C4D] Bug Reporting => Topic started by: lollolo on 2021-06-03, 14:20:16

Title: Objects using displacement not rendered in IR
Post by: lollolo on 2021-06-03, 14:20:16

Hi

It still happens that objects with displacement disappear in IR. I'm not sure when and why this happens, it looks very random to me. It happens daily and in every scene.
They appear again when I change something of the object like move a polygon or change material. 

Can you confirm this behavior?

C4D R20
7.0 daily May 17
Win 10

Title: Re: Displacement not rendered in IR
Post by: TomG on 2021-06-03, 14:42:39

Not sure what you mean - do you mean they disappear if you, say, move the camera or point of view? If so this is expected, as Displacement is calculated based on what is visible in the view at the time of starting IR - this is Screen mode, where things not in the field of view do not get displacement calculated, to speed up calculation and reduce memory requirements, and this means if you move the camera you may find objects where displacement has not been calculated. IR would need to be restarted in this case (or you can use World mode rather than Screen, but then you lose the benefit of faster calculations and reduction in memory needs).

Title: Re: Displacement not rendered in IR
Post by: lollolo on 2021-06-03, 17:46:17

Sorry Tom, I wasn't clear.

Here is an example:
First time when I started IR, every object was actually rendered, as expected.
Second time, just a few seconds later, without any changes, all object that use displacement aren't rendered. They just disappeared in IR.

It can happen in every scene, but it doesn't happen always.

Title: Re: Displacement not rendered in IR
Post by: TomG on 2021-06-03, 17:55:14

Oh I see, the objects disappear, not the displacement - well, that is a bit more severe :) Sadly I've not heard of anything like that, will have to leave it to our support folks!

Title: Re: Displacement not rendered in IR
Post by: TomG on 2021-06-03, 18:03:54

Checked in with support and it is a known issue (internal tracker (Internal ID=618560474) )

That said, we had a shortage of example scenes, is there a chance you could send this in to us via private uploader (see links in my signature), as the more examples we have, the better chance we have of tracking down the cause and finding a fix.

Title: Re: Displacement not rendered in IR
Post by: TomG on 2021-06-03, 19:02:05

One possible cause we've been looking into is resizing the VFB immediately after starting IR (before an image shows, while still calculating displacement). Any chance that could be what has been happening?

Title: Re: Displacement not rendered in IR
Post by: lollolo on 2021-06-03, 23:49:50

Hi Tom

Thank you for your reply. I haven't resized the VFB after starting IR.

I uploaded a small example for you.

Successfully uploaded as 1622755848_Displacement-Issue.zip.

Title: Re: Displacement not rendered in IR
Post by: lollolo on 2021-06-03, 23:57:57

Hi Tom

I did some testing.

It seems to me that it is much more stable when I have only one object.
When I have more objects using displacement, all these objects disappear much more often.

Successfully uploaded as 1622757236_Displacement-Issue-Video.zip.

Title: Re: Objects using displacement not rendered in IR
Post by: Beanzvision on 2021-06-07, 16:43:20

Hi there, I have checked your scene and can also reproduce this. Confirming as well.

Title: Re: Objects using displacement not rendered in IR
Post by: mabographics on 2021-06-30, 15:33:17

Hey,

I'm experiencing the same issue, But only when I choose Start IR in the VFB not when i just use Start...

Title: Re: Objects using displacement not rendered in IR
Post by: Stefan-L on 2021-06-30, 20:40:48

Hi Guys

any progresson a fix for that?
sadlyatm this error is an absolute show stopper for v7 yet,which is otherwise great,- we cant wait to jump to corona v7as soon it works reliable:)

Title: Re: Objects using displacement not rendered in IR
Post by: mmarcotic on 2021-07-01, 09:47:51

Hello,

we are working on this. We do want to fix this before the release and we are allocating our resources to do so. At the moment it seems like a very messy bug.

By the way, I'm pretty sure this was happening also in V6, can anyone confirm?

Thanks,
Jan

Title: Re: Objects using displacement not rendered in IR
Post by: steppes on 2021-07-03, 13:32:20

no problems im v6. But sometimes (not always) in v7

Title: Re: Objects using displacement not rendered in IR
Post by: exor on 2021-07-06, 23:34:46

Quote from: steppes on 2021-07-03, 13:32:20

no problems im v6. But sometimes (not always) in v7

+1

Title: Re: Objects using displacement not rendered in IR
Post by: Stefan-L on 2021-07-12, 11:53:29

"By the way, I'm pretty sure this was happening also in V6, can anyone confirm?"


NO, that really never happened to me in any scene in v6.

in v7 it is in more or less EVERY scene. and all those scenes render fine in v6 (i never had any big issues in v6, beside of course with the old known issue mb and render instances)

Title: Re: Objects using displacement not rendered in IR
Post by: Stefan-L on 2021-07-12, 11:57:43

p.s beside all these scenes using displacement,

they also often use bool objects or similar c4d generators if that might help you,
as well as soem groups and obbjects being set to be hidden.

my guess is that the export get messed up and shifts the object list somehow, so objects that are visible get flagged  invisble, or some like that

Title: Re: Objects using displacement not rendered in IR
Post by: vudumotion on 2021-07-14, 16:45:14

Hey!

I have the exact same issue. 7.0 rc 2 (and rc 1) C4D R23.110. No issues in V6.

Cheers,
D.

Title: Re: Objects using displacement not rendered in IR
Post by: Beanzvision on 2021-07-14, 17:14:02

Hi there, would you also be able to share your scene with us via our private uploader? If so, the link can be found in my signature below. Thanks in advance :)

Title: Re: Objects using displacement not rendered in IR
Post by: Stefan-L on 2021-07-21, 19:38:10

for me the problem seems solved in a first test with some scenes, they render again ok, thanks a lot!

now switch to v7 is nearfor us:)