Messages

1

[C4D] I need help! / White contour on mask

« on: 2022-05-31, 18:44:01 »

Hi everyone, I was wondering if anybody encountered this issue with corona, the export is 32bit exr passes into photoshop and I am getting this result.
Hopefully the solution is not to re-render all the camera views, there are so many of them....

2

[C4D] I need help! / Re: The predictable out of ram usage message

« on: 2022-05-19, 23:49:31 »

I got textures from megascans, I guess I didn't think about using textures for closeup and fareaway objects, isn't there an option like in vray to resize textures by ticking a button before rendering?
I will cope with the issue as it is, guess I can't do anything about it, I have read in the forums people with 120gb ram running out of ram, so corona must also learn to manage the ram and textures.

3

[C4D] I need help! / Re: The predictable out of ram usage message

« on: 2022-05-19, 16:32:30 »

Thank you, for the help, will try the tricks you mentionned, Corona Ram Management is very messy. After dealing with this project, will try and see vray gpu or vantage can be faster or better in memory management, thank you taking the time to address my issue.

4

[C4D] I need help! / Re: The predictable out of ram usage message

« on: 2022-05-17, 16:34:36 »

What do you mean by green backdrop a photo?

My textures are 4k and only I only have 14 materials with loaded 4k textures,.
Edit :  trees and plants also have 4k textures.

How do I see the ram c4d takes before I render?

Edit : just figure something out about surfacespread clone count, I used to spread on a plane with a specific selection for the trees and grasses, but that plane was also the same plane used for my other lanscaping, like pool modeling, road curb etc.... I just split the trees and grasses on their own plane, and now surfacespread clone count matches the max count, before it didn't match....
before If I input 100 max count, the clone count used to be like 14 only hence the increase to 500 trees for a simple house like this...

5

[C4D] I need help! / The predictable out of ram usage message

« on: 2022-05-17, 16:19:20 »

Hi, once I again I ask for help on this forum to try to understand how much Ram corona needs, I have found people with more powerful workstations having the same issue.

My setup
Ryzen 7 3700x
32gb ram
rtx 3060 (irrelevant for corona I know)
Cinema 4D S24, Corona 7

I am rendering a simple house, no interior furniture, Grass only visible in the area covered by the camera
500 trees spreadwith surfacespread which is a lot for such a small house but somehow 100 trees don't seem to cover the surrounding of the house, 120 000 grass paches, some plants and flowers (all vegetations are proxied)
Render resolution 5237 x 2500

I receive an out of ram message when rendering, I deactivated all displacements from materials, I unticked keep in memory from all proxies.
But still the ram message, no other application is running during the render.
Because I found no real answer from the previous posts, I assume this issue isn't getting solved any time soon?
Is this issue solved with Corona 8? I hate switching during projects, I encountered some issues in the past...

Is there a way to limit corona ram usage?

6

[C4D] I need help! / Re: Interior render fireflies issues

« on: 2022-02-24, 16:19:35 »

Thank you, I will try that, I was only using the default sky and sun, but I will do as you described

7

[C4D] I need help! / Re: Interior render fireflies issues

« on: 2022-02-24, 11:19:44 »

My guess is that the lighting fixtures are blocking most of the light and you increased light source intensity to enormous extent to battle this and that leads to extreme overbright pixels that are nearly impossible to get rid of. Try to temporarily hide lighting fixtures, normalize all light sources and see if the problem with fireflies goes away.

This is the experiment I made, I disabled all the lights, then turned them on one by one.
- First picture only ies lights + sun (hdri sky + light material disabled) no sign of fireflies on the picture
 - Second picture ies lights + light material + sun (hdri sky disabled) no sign of fireflies
- Third image hdri sky + sun only (ies + light material disabled) I can see some white spots
-Fourth picture hdri sky intensity raised to 25 + sun at normal intensity (ies + light material disabled) I can see some fireflies

It looks like the hdri sky is the culprit.

Any solution?

8

[C4D] I need help! / Re: Interior render fireflies issues

« on: 2022-02-24, 10:40:49 »

Thank you

I will try it and let you know...

9

[C4D] I need help! / Interior render fireflies issues

« on: 2022-02-24, 00:40:46 »

Hi folks I need some help getting rid of white spot or fireflies in this interior render.
I am using Corona 7 with C4d S24.

The scene is lit by several ies lights + a sun and sky .

I also use light materials for the bulbs, but they emit light at a power of 2. I disabled all the lights visible in reflections, still nothing.
I first rendered the scene and it took 8 hours and the fireflies were still there so I closed C4D without saving the first image because I was pissed.
I had to re-render this one to show you the scene.

What do you think might be causing this?
I am not a programmer but I was wondering, do perfect render engines exist? I mean a render engine where you put your light and your materials and everything just render perfectly without you having to tweak the settings and go online everytime looking for help?

10

[C4D] General Discussion / Re: Extremely Slow render times

« on: 2021-12-31, 10:45:34 »

Hello ! Can you send me the scene file ? I Have got Threadripper 3970x ( 32core ) with 64GB Ram.

What is the best way to send a 1gb compressesd file?

11

[C4D] General Discussion / Re: Extremely Slow render times

« on: 2021-12-31, 10:44:38 »

A low-quality HDR can produce bad shadows and noise. Also, if your system is running out of RAM it will swap with the hard drive which is dramatically slower unless you have super fast SSD. Also consider the resolution of your materials. In my opinion, only the trees near the camera could use such high resolution textures. It's just overkill unless you are rendering different shots in the scene then that makes sense. C4D loads all of those 4k and 6k images into RAM. I don't know the sizes you have, but I can imaging each of them could be hundreds of MB or more for each one. That CPU is not world-shattering speed-wise. I see online it's does 12195 in the Cinebench r23 multi-core test. For example, my 5-year old iMac Pro comes in around 16737 in multi-core. Either one is nothing compared to Threadripper 64, but then again, that $4,000 USD just for the CPU. I get it.

What I love about Corona is you can still get decent speed on older CPUs. I think it's a matter of learning to adjust your scene for best optimization.

Do a quick test. Change your sky to Physical Sky (no HDR). Maybe add a Sun to match your shadows. Set your settings to match mine to override all materials and render a test. Try 100 passes or use the Noise Level Limit to 5 and hit render. See if you still have noise. If you do NOT, then I suspect it's the HDR creating the noise.

Sorry, I'm rambling a bit. Post back your results. Good luck.

Another thought. If it really is such a small area giving you trouble, consider rendering just that area with more passes, then just paste them together.

I managed to cut down the render times from 10 to 4hours using only corona sky+sun

I decided to redo all the texturing, 4 hours is still too long for me, I have to deliver like 8 renders interior included...
I will also look to replace all the trees.

Thanks for the help, you guys are awesome.

12

[C4D] General Discussion / Re: Extremely Slow render times

« on: 2021-12-30, 21:01:25 »

Are you using the  Corona Sky AND the Sun? The sky will provide light from all directions. Can we assume you are also using a Corona Camera? You may need to adjust settings for exposure.

You were right I adjusted the settings like you said, no hdri, just a corona sun and sky. Now the light is illuminating the whole scene, let's see if the render time is reduced.

13

[C4D] General Discussion / Re: Extremely Slow render times

« on: 2021-12-30, 20:59:43 »

I have opened each material, I am using only 5 materials with 4k and 6k textures.  Maybe the specular, glossiness, displacement from the 5 materials are making the scene slow...

I will try and find 2k versions of these textures and replace them

14

[C4D] General Discussion / Re: Extremely Slow render times

« on: 2021-12-30, 20:25:15 »

Thank you, I will try your settings, I have before using the HDRI, tried the corona sun, but I wasn't getting the same quality of lighting than the HDRI.

The HDRI is from HDRI-skies, it weighs 500MB is it low quality or High quality?

For the trees, I have to render 8 differents angles and all of them must have high quality trees. For the textures what do you recommend? I am using some 6k and 4k textures for crisp renders, is there a way to reduce their resolution?

Attached below is a screenshot of the corona sun, the light is not reaching all the dead angles, and it's too dark.
it maybe me who don't understand how to use corona sun, but the trees are blocking the sun, the noise will seem worse in my opinion.

15

[C4D] General Discussion / Re: Extremely Slow render times

« on: 2021-12-30, 20:05:51 »

That's the issue, we will always need more ram, I heard of people running out of 128GB of ram. Looks like it's not an exact science. It may be one of the limitation of CPU renders. I am not too geeky but from what I have read online, GPU renderer like redshift can handle millions of trees with an 8gb GPU.

The issue is the ease of use and it's going to cost additional money, I am sure a lot must be done before getting accurate renders in redshift, but I am looking into it as well, If I can't manage to render this small scene on a CPU render, I must at least try GPU.

I have already invested on this setup and my next upgrade must be justified by more income from clients, so I am afraid adding or upgrading RAM is out of the question for now.

The scene is 700MB plus the texture folder it's around 1.5GB. Should I send it via wetransfer?