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Messages - FS-Marc

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[C4D] Bug Reporting / Cant save Multi-Pass-Image
« on: 2024-06-24, 10:10:46 »

We ran into the issue that we wanted to render an animation using TeamRender-Clients and the Take-System in C4D but nothing was saved.
At first it seemed to work so far but after the Main-Take was rendered for some reason no images were saved anymore. It created the folders described in the save path but didnt save files (OEXR format - but I tried other file type and it didnt work either).

Only workaround for now was to do it without the multipass and only saving the final image which will restrict us in comp and is far from ideal.

Seemed very similar to the issue John_Do was describing in the following thread (

Restarting the IPR (Stop - Start) "fixes" the issue. But as soon as you change anything while the IPR is running the error occurs again (Like moving around the object).

Most basic setup would be the following:

Having one object with a mirror-like texture.
Corona Sky set to Shader/HDRI with a random shader.
Plane with Shadowcatcher material set to Environment with the sky loaded in.
Scene Environment Direct visibility override turned on with a !!Material loaded that has an image loaded in the texture slot in the Base Layer with the mix mode set to Multiply and some not defaulted setting to the Color that is multiplied with.

Sorry but I cant make a screen capture at the moment scine my remote setup blocks the capture. If the instruction didnt help I will send you a video as soon as possible.


Ive found that the materials (their reflection mostly) in the IPR turn yellow when lights are moved. This seems to be a bug when multiplying the Texture of the background with a color.

The workaround would be to use a Corona color mix - which works but thats just one more uneccessery step.

[C4D] I need help! / Re: Corona Slicer
« on: 2022-11-04, 08:27:51 »

do you have a short guide how to reproduce the issue or are you able to share your scene? I never experienced such issues unless there was something wrong with the normall direction or geometry of the used objects.

Another method:

Use a Vertex map as the "Distribution" shader for Corona Scatter - add a "Vertax Map Tag" to your Terrain you sculpt and mark the Checkbox "Use Fields" - Create a e.g. linear Field and place it as needed.

Works, but again it is so slow on my side that you cant really use it while sculpting. I´d stick to the camera clipping if there isnt anyone with an idea.

Little Workaround with the downside of not having the option to use camera clipping.

Create a camera with "Projection Top" with smallest Zoom Setting and give it the height you need. Then use the set-up camera in the Camera clipping tab and enjoy.

I also tried using gradients as Shaders for distibution which theoretically should also work, but this just made c4d unusable slow - maybe thats only a problem on my system.

[C4D] I need help! / Re: Splotches on objects
« on: 2022-10-27, 14:40:37 »

Very much depends on how you look at it - if you rotate the camera or move the light they become very clearly visible (you can also see them on top and on the right side of you render)

I also tried my best mostly using a simple c4d noise :)

[C4D] I need help! / Re: Splotches on objects
« on: 2022-10-27, 13:02:48 »
This is most likely caused by your Noise Shader in the Glossiness slot.

Try to soften that ohne until you dont get so obvios blobs (I would rather look for some surface imperfaction shader online to use and  put that in a "Color mix" - that  for time saving)

Keep learning and create great things,


[C4D] I need help! / Re: Texture turns black when stacked
« on: 2022-10-24, 14:05:55 »
Hey there,
I found to some degree it is possible to work with material stacking with corona if you enable "Add Material" in the material tag and add any texture as diffuse texture.

Thing is Corona Renderer seems to be interpreting the "Add Material" Mode in the wrong way which makes it display incorrectly.
Attached you can see 2 comparisons of stacked materials. First row with a green checkerboard texture, second row with a solid green color. Corona seems to be falsely multiplying the Diffuse texture with the Material underneath instead of overlaying it on top like the standard C4D Materials do. This is a thing that should be fixed.

The material underneath turning black otherwise is probably because you did not turn on "add material"(?).


I hope I understood your situation correctly - I would recommend trying the C4D built in "Variation-Shader" (found under Effects) to achieve the result you desire.
This way you can adjust the UV-Tiles by Color, Gamma, Saturation etc.

[C4D] I need help! / Re: AMD 3990X massive slowdowns
« on: 2022-09-21, 10:59:16 »
Do note that messing with the BIOS is something you're doing at your own peril. That said, it shouldn't be too difficult to find the SMT toggle :)

Just to make this super clear though, we have identified the issue and are working to fix it so the above should be a temporary solution if you're running into the issue you're mentioning.

Thanks you very much for the advice. I can confirm this method resolves the problem (with a hit to performance . This makes my work process much faster so the tradeoff is worth it for now. Hopefully one day we can make use of the cpu as supposed to.

[C4D] I need help! / Re: AMD 3990X massive slowdowns
« on: 2022-09-16, 13:26:52 »
For the time being what you can try doing is disabling the SMT in your BIOS. That will effectively be disabling multi-threading on your CPU which means you will be running with 64 cores and 64 threads instead of 64 cores and 128 threads. Without a question that is not an ideal solution because you'll lose a good chunk of performance (roughly ~20-30% or there abouts) but it beats limiting the threads inside Cinema 4D to 12 as you mentioned. The UI and everything should work quite butter smooth once you do that.

Do note that messing with the BIOS is something you're doing at your own peril. That said, it shouldn't be too difficult to find the SMT toggle :)

Thanks for the tip will try that as soon as I am back in our office and give some feedback.

Just to make this super clear though, we have identified the issue and are working to fix it so the above should be a temporary solution if you're running into the issue you're mentioning.

Awesome to hear!

[C4D] I need help! / Re: AMD 3990X massive slowdowns
« on: 2022-09-16, 12:09:08 »
Maybe it's just expectations but I've never seen other people complain about it or maybe other people just don't use heavy scenes I don't know.

Do you experience it only in "heavy scenes"? I made the experience that it does not matter how heavy or light the scene is.

It's little bit better for less-threaded machines because they keep better clocks during multi-threaded use. IR is very demanding because you're using your CPU fully multi-threaded, but still need high speed and availability of best single-core.
Windows is not exactly fantastic with process scheduling, which is finding the best available single-thread and funneling resources to it (so for example, memory access isn't hogged).

Youre definetly right with that! A colleague has the 3970X and and it works like a charm. Just disappointing that its "bigger brother" is handicaped in such way.

But I have go as far as only giving Corona 50perc. of CPU during IR. Still the same, heavy lag. Multi-seconds to edit materials in editor.

Well I guess if there is no way to resolve this we will use it as another renderslave and have to invest a bit more to get a more flexible system...

I just thought that it might be some kind of issue with the way Corona Renderer is handling things since I dont have any problems using the built in renderer in interactive mode which should also be multithreaded AFAIK.

[C4D] I need help! / AMD 3990X massive slowdowns
« on: 2022-09-16, 10:55:29 »
Hi there,

We configured a Workstation with a AMD Threadripper 3990X hoping it would be a blast to work with in C4d + Corona which it is if you do rendering only. But as soon as you use the Interactive Renderer do this the whole System becomes unusable - you cant even move explorer windows without huge lags. So every speed advantage is completely lost since you cant work in your scene while IR is running.
Also Material editing seems to be extremly slow due to (I guess) rendering the preview for the material manager before updating the Viewport.

# threads override seems to work if you use a very small count like 12 - which then is too slow in rendering. If you use anything high the system breaks down again.

Has anyone any ideas or had a similar experience and knows a fix? Please let me know


OS:Windows 11
Processor: AMD Threadripper 3990X
Motherboard: ASUS ROG Zenith II Extreme Alpha
Ram: 32GB ECC UDIMM DDR4 2666 x8
GPU: Geforce RTX 390
Storage: Samsung 980 Pro NVME 1 TB x2
Cooling: Noctua NH-U14S TR4-SP3
PSU: Be Quiet! Straight Power 11, 1000W

Everything runs in Stock-Settings. No OC.

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