Preparing geometry

[c4d019]

I'm trying to figure out a solution to this problem, not sure if it's C4D or Corona problem but when rendering an animation each frame takes longer than the last, it appears to be at the 'preparing geometry' stage and gradually increases in each passing frame.

When I restart C4D and begin the render from the from the last frame the 'preparing geometry' stage is fast again, but increases with every next frame.

At this rate it will take a very long time to get this project finished.

Can anyone help?

Thanks.

[houska]

Hi, could we see your scene so that we can figure out what is causing these delays? You can use our private uploader (see my signature below) if the project needs to stay private.

Otherwise, it's a shot in the dark... Actually - are you using any plugins other than Corona? It could also be that some of them is misbehaving

[c4d019]

Uploaded to dropbox.

No plugins in scene and when dof and motion blur are enabled the increase in render time between each frame is much greater than if they were disabled.

Frame range setup from 180 to 250 to hopefully illustrate the problem.

Thanks.

[Philip kelly]

Sorry for dropping in on this question.
Are you running the file from Dropbox?
That could be the issue , because of the bandwidth.
If your not, apologies.

[houska]

Are you running the file from Dropbox?

I suppose they're not. The mentioned Dropbox folder is our private folder for users to share their scenes :-)

[c4d019]

Any idea when I will receive some feedback regarding the above issue?

Thanks.

[houska]

Hi, we were investigating the issue yesterday and there definitely seems to be something weird happening. We did reproduce the slowdowns, but were unable to find out what causes them. We'll keep you posted if we find out something.

P.S.: You should use more instancing ;-)

[c4d019]

Thanks, yes I probably should have instanced more items as I'm new to cinema 4d, I'm also pretty good at breaking software so feel free to include me in the next alpha :)

[Merlin]

Hi,
I have a similare problem:
More than 4mn of parsing scene, every time I stop the IR and restart it, it's TOO LONG!!!

Corona is very badly handling the memory, I have a out of memory on a scene of architecture with some grass and 10 trees, yet I have 32gb of Ram and only 54% are used. There's an inconsistency somewhere, right?  Tonight I made a rendering and C4D had bugged at the end of 3H30 and impossible to save the rendering, it's INTOLERABLE!!!

[Designerman77]

Merlin, from my experience, the parsing takes longer if I have plenty of displacement in a scene.
My RAM is unfortunately also „only“ 32 Gigs.

Try to switch off displacement on objects where it’s anyway not really necessary.

I‘m curious if it will help.

Edit: I saw that you use Mograph cloner... From my experience it’s quite slow, ineffective and slows down the scenes. This is why I use Laubwerk. Works more RAM-friendly.

[Merlin]

hi Designerman77,
Thanks for your help but,
I just ran a test without displacement and I win nothing …
On the other hand I still have this low Ram message that does not match the information displayed on Istat menu …

and how do you explain that the same scene tested with Redshift only takes a few seconds to analyze and shows no memory problems?

[Designerman77]

Hey Merlin,

that sounds indeed concerning. Okay, Displacement was just a guess, though it seemed quite clear that there is probably not much in the scene.

Are you on the latest Corona? Official release I mean?

P.S. I also experienced similar error warning on my machine, but only on big scenes rendered in 4K.
I thought, maybe indeed the 32 GB are a bit spartanic. Will update it.

Remarkably, this error message appears AFTER the render was calculated.
At you it appears before?

Also on my machine it never caused crashes or anything. Simply appeared without any negative effect.

[Merlin]

Sometime before, sometime after It seems to me.
I couldn't finish my rendering in 1920px and I had to decline to 1500px.

I have another different problem, and it is not the first time I have the BloomGlare pass which is displayed correctly in the VFB and it is completely black in the viewer
It's incomprehensible to me, see the picture bellow.

[Designerman77]

Do you always render out so many different passes? You need all of them? I think this needs huge amount of RAM... This might explain your RAM running low. 
1500pix image...that’s super tiny. Actually no RAM-eater.

I don’t know the requirements to your renders... but me personally I try to keep the post as little as possible. Because the more one fiddles around in post, the higher the risk to make a physically correct render (or photo) look more and more unnatural.

At least this is my observation.
That’s why I try to get the raw render as good as possible...

[Merlin]

yes I agree with you and I also spend a lot of time doing rendering tests to get the best possible result, but when the rendering is finished we always surprises in post.
My passes are basic + a few masks + a few lights.

And I don't know why my BloomGlare pass stays black?

Look at the screen capture, do you think that's a lot of passes?

Thanks