Messages

1

[C4D] I need help! / I'm getting NaN warnings and strange light behaviour

« on: 2024-08-22, 07:25:18 »

Hi,
I working on an interior animation project.
I have very strange light behavior with some of my lights - I have some rectangle lights that produces much higher amount of noise than other lights. As you can see in the 3 pics attached, when I move the light I'm getting high noise in the light area. When I change the directionality percentage of the light, the cone of noise I'm getting also changes. This happens with many lights in the scene (But not all). It happens also when I use Override mtl in the settings, so it's not a material issue. I'm having this issue in corona 12(hotfix 1) and also in corona 11. Notice that the high noise levels are seen in areas that are not lit by the light (Because its behind a solid object) but are inside the light cone. I've tried copy everything to a new scene but it didn't help. I also tried to use all GI solvers. This issue is causing very high render times (6 hours per frame instead of about 40-60 minuets as i'm used to get for this resolution & noise level in interior projects with my AMD Ryzen 7950X3D).
Another problem I have with this scene is that when I use corona 12 (hotfix1) in C4d 2024 I sometimes get Nans warnings and C4d crushes after a few frames. When using Corona 12 with C4d R24 I don't have crushes but also have Nan warnings sometimes. When using Corona 11 on this scene I have no crushes and no NaN warnings no matter what C4d version I use.

I've opened a ticket about this issue and sent the project file, but in case anyone here has an idea why this is happaning, dont be shy

2

[C4D] I need help! / Re: Layers compositing problem

« on: 2024-06-27, 05:08:50 »

Actually I did understood what davetwo suggested, but as I wrote, I needed to render the layers separately and not render the whole image together and separate it after in post. This is because in the future the client will need to replace some jewelry pieces and he doesn't want to render everything just to replace several objects 

3

[C4D] I need help! / Re: Layers compositing problem

« on: 2024-06-25, 06:18:59 »

Thanks everyone, I've already rendered everything, The best solution I've found (Not perfect results but almost perfect):
1. Background layer: The background is rendered regular and on the stands and jewelry I've used a compositing tag and unticked "seen by camera"
2. Stands layer: I used the render selected and included the stands. On the jewelry I put a compositing tag and unticked "seen by camera"
3. Jewelry layer: I used the render selected and included the jewelry

I also ticked the straight alpha on all renders, at first I thought it didn't help but after close examination I saw it helped a little.

BTW, I talked to a colleague that worked on a similar project for the same company in 3dmax+corona and he did exactly what I did, the result he got was 100% perfect, for me it was only 99% perfect

4

[C4D] I need help! / Re: Layers compositing problem

« on: 2024-06-20, 11:04:58 »

* Can't use multipass. This has to be a PNG solution
* Already tried to tick the "straight alpha" - didn't help

5

[C4D] I need help! / Layers compositing problem

« on: 2024-06-20, 10:08:27 »

Hi,
I have a jewelry store and I need to render 3 different images for my client:
1. Only the store (walls\floor\pictures on the wall\trees outside ect.) without the jewelry and without all the stands of the all the jewelry pieces.
2. Only the stands of the all the jewelry pieces without anything else.
3. Only all the jewelry pieces without anything else.
The client need the images in PNG with the correct alpha imbedded so that when he put the layers together the image will look perfect. Note that he can put them together only in "normal" mode (no linear dodge\screen or any other photoshop layer blend mode - he is doing that with python script for further use in a certain application)  - So I can't use the multipass system for that and export a PSD file. It has to be PNG.
Another thing to think about - for example, when rendering only the jewelry, I need that all the jewelry that is obscured by other objects (like the stands\store) will not be rendered.

The problem - No matter what I've tried, when I compose the Images There is a halo around the layer of the jewelry and the layer of the stands. Sometimes is a black halo, and in other methods is a transparent halo.
I've tried using the compositing tag and tick\untick the "seen by camera" on each render as needed.
I've also tried using the Include\Exclude option in the Corona render menu in the General settings tab.
Obviously I'm doing something wrong because it's only logical that I could do what I need....

So...What am I missing ? What is the correct way ?

6

[C4D] I need help! / Re: Exclude object from corona sun doesn't work

« on: 2023-12-29, 08:26:38 »

Well, It was pretty stupid, but I just forgot to put a compositing tag on the cylinder and UnTick the "Cast Shadows"

7

[C4D] I need help! / Exclude object from corona sun doesn't work

« on: 2023-12-28, 14:06:21 »

Hi,
I'm trying to exclude a big cylinder with a city texture from a corona sun, but it doesn't seems to work, please see attached images
I'm still on corona 10. C4D R2024

Never mind, I found the problem

8

[C4D] I need help! / Re: Strange squared artifacts

« on: 2023-02-21, 04:25:14 »

Hi Kobi,

I've just checked your scene, disabling the adaptive light solver as requested by my colleague Maru, should resolve this as it does when testing it here. We hope that helps. :)

Thanks, that solved it.
I also found out that where I had problems with the artifacts - If I changed the material from physical material to legacy material that also solve the problem.
Any idea why this happens ?

9

[C4D] I need help! / Re: Strange squared artifacts

« on: 2023-02-20, 18:36:22 »

Can you please check the performance tab for the Adaptive Light Solver?

I'll try that tomorrow morning

Thanks, I was just making sure. In that case, it may be related to the adaptive light solver or adaptive environment sampler.
You can find both options in the development/experimental stuff tab - https://support.chaos.com/hc/en-us/articles/4528469959953
You can try disabling one of them or both and check if the issue persists.

We are interested in the scene itself. Could you please attach it to a support ticket here? https://support.chaos.com/hc/en-us/requests/new

I just opened a ticket with the scene file attached, ticket number is #88434

10

[C4D] I need help! / Re: Strange squared artifacts

« on: 2023-02-20, 16:06:36 »

Thanks, I was just making sure. In that case, it may be related to the adaptive light solver or adaptive environment sampler.
You can find both options in the development/experimental stuff tab - https://support.chaos.com/hc/en-us/articles/4528469959953
You can try disabling one of them or both and check if the issue persists.

We are interested in the scene itself. Could you please attach it to a support ticket here? https://support.chaos.com/hc/en-us/requests/new

I'm not sure what options are you referring to, I don't see those options in the development tab.
Regarding sending you the scene - no problem - i'll do it later today

11

[C4D] I need help! / Re: Strange squared artifacts

« on: 2023-02-20, 15:48:18 »

Is this happening when your have UHD Cache set as your secondary GI solver? Or only when using the 4K Cache GI solver?

I tried different GI Solvers, nothing is perfect and those strange squares still appears no matter which solver I use, but It seems that using UHD Cache with preset set to animation instead of still frame gives the best results (much fewer artifact than other methods)

12

[C4D] I need help! / Re: Strange squared artifacts

« on: 2023-02-20, 15:39:24 »

I also tried different GI Solvers, nothing is perfect and those strange squares still appears, but It seems that using UHD Cache with preset set to animation instead of still frame gives the best results (much fewer artifact than other methods)

13

[C4D] I need help! / Re: Strange squared artifacts

« on: 2023-02-20, 15:03:21 »

Hi there, is this during rendering or are they in the final images? Also, what does your lighting setup consist of?

This is happening every time I'm rendering in viewport or final rendering...doesn't matter.
Light setup consist of 1 corona sky with HDRI for GI only and 1 skylight with HDRI for reflections & direct visibility. also some spherical corona lights for the interior

No caustics are used

Scaling of materials is correct - this happens on all kind of materials, not just a specific one

14

[C4D] I need help! / Strange squared artifacts

« on: 2023-02-20, 14:33:17 »

Hi guys,
I'm having strange artifacts in my renders (render sample attached) - I want to say that it looks like a bucket problem but I don't know if corona is rendering behind the scene in buckets like vray...
Anyway, anyone has an idea why this is happening ? I have a dead-line for Thursday and really need a solution fast
Peace,
Kobi

15

[C4D] I need help! / Re: How to get the correct alpha channel for this problem

« on: 2022-10-20, 05:03:25 »

Thanks, I followed Beanzvision advice and it works great