Messages

16

[Max] I need help! / Re: Long rendering time

« on: 2025-03-04, 00:24:09 »

@maru: Thanks, so you confirm there's no need to upload the scene and it's investigated by your team to be fixed in the future?
That'd be great.

In the meantime I'll do some region render only for the glass area.

17

[Max] I need help! / Re: Long rendering time

« on: 2025-03-02, 06:49:02 »

Do you mean enabling caustics for that single glass object in its material settings, or enabling the caustics solver in Render Setup > Performance?
If it's the latter, then the caustics solver then becomes active for pretty much all reflective surfaces. You can add a caustics render element to see what exactly is handled by it.

Both. I enabled caustics in the glass material settings and I enabled the caustics solver in Render Setup > Performance.
The only refractive material in the scene with caustics enabled is the glass on the table.

I understand that enabling the caustics solver makes photon calculation available for the whole scene, and this is why I used the caustics include/exclude list: the include list contains only the table, nothing else.

And by inspecting the Caustics render element, I can see caustics being rendered on the table only. So I still don't understand why the render takes 2x longer when only such a small portion of the whole image is concerned by the photon calculation.

18

[Max] I need help! / Re: Long rendering time

« on: 2025-02-28, 05:51:40 »

So I did some tests, given what you said, but the problem remained, except when I turned off caustics.
I turned On Caustics so that the glass on the table casts nice light patterns on the table. And this is what is causing this massive slow down: when I turn caustics Off, the image renders 6.5x faster!

I hardly understand why, as the only object in the scene set to receive caustics is the table. How can a small object like this glass being responsible for the render time being 6x slower?!

19

[Max] I need help! / Re: Long rendering time

« on: 2025-02-26, 22:15:22 »

Thanks guys.

More info:
_ Max 2023 up to date / Corona 10HF2
_ FP Pro 8.0.6
_ RC Pro 5.2.8 I can't update these as my support is now expired
_ no environment effects

I finalized a render: 3000px, noise limit 4%, render time: 9h30

_ Generally speaking I do agree with @alexyork about not modelling windows as thin planes, but in this particular case I will give it a try as I want to reduce the reflections in the windows, quite the opposite of what we're after most of the time.

_ Light sources: all optimized, except light bulbs in the ceiling. I will do that as well (including only the spot light fixtures etc ...)

20

[Max] I need help! / Long rendering time

« on: 2025-02-26, 12:03:26 »

Hi,

I'm rendering an interior. Nothing fancy, just a basic dining room with a small kitchen and a living-room.
The scene is lit by a Corona Sun, Corona Sky as environment, very basic.

Here are two screenshots: the plan, so you have an idea of what the space looks like, and the camera view so you see what the actual render will look like. These are clay viewports but all materials are done. No displacement. Few forest packs here and there, for mulch and grass mainly, few Railclone objects, for the fence mainly. Some Coronaproxies for neighborhood buildings and some small trees. Nothing extraordinary really.

When I render in 4000 pixels wide, Corona says it will last for 15 hours. I use a Threadripper 3990X: 15 hours seems a lot for this 128 cores cpu.

I tried playing with the "GI vs. AA balance" setting, but I didn't notice any particular change in the rendering time.

There are only 5 windows, so I guess what Corona is struggling with is the lack of light coming in, especially in the kitchen area.
To help brighten this area a bit, I added a simple Corona Rectangle Light in front of the kitchen island.

My question is: what can be optimised in order to reduce the rendering time?

Thanks a lot for your help,

21

[Max] I need help! / Re: Does anyone know how to create this material in Corona/3ds Max?

« on: 2025-02-25, 05:18:57 »

Hi,

It looks like frosted glass to me. Start from a CoronaphysicalMtl and choose the "Glass frosted" preset. Then play with the Glossiness value.
As for the other materials, they look like metal, so do the same but choose a metal preset.

22

[Max] I need help! / Re: Regarding render farms. Deadline or Backburner?

« on: 2025-02-18, 08:35:10 »

Sorry, I'm not sure to understand your question.
If you send a job to an online render farm, there's no need to send it as a DR job: the job will be distributed by the render farm itself over all its available nodes.

23

[Max] I need help! / Re: Regarding render farms. Deadline or Backburner?

« on: 2025-02-18, 06:51:11 »

Hi,

I used to work in a studio that used Deadline as their job submitting software, and so far as I remember it did support DR rendering. But it was back in 2018, and given what you say it's not working anymore. This is strange. I'd be curious to know why they don't support this option anymore?

I don't know if there's any kind of solution to make Backburner working with DR but, eventough, this really is something of the past, and unless you like 90's looking like interface, I don't recommend it :))

Did you try Pulze Render Manager? Awesome software. Easy to use: https://www.pulze.io/products/render-manager?trk=test

24

[Max] I need help! / Re: Caustics flickering (corona 12)

« on: 2025-02-17, 00:19:42 »

Hi,

Just jumping in this interesting conversation: I've been testing caustics animation with C11 with no particular flickering issue, even with a low number of passes. I used Path tracing for both solvers though. Did you try this option @RecentSpacesSam?

I read quite a lot of issues happening with Corona 12, this particular one about flickering caustics just being one more among others about slow loading/saving scene issues etc ... this really makes us reluctant to switch to Corona 12 (we're sticking to C11 at the moment).

I appreciate Corona but I'd be curious to hear from you guys at Chaos about what you honestly think of C12 and its related issues,if these issues are going to be addressed in C13, and if so, when (with the hope C13 won't bring new bugs/instability).

Thanks

25

[Max] I need help! / Re: Saving in EXR: Render Elements are not saved

« on: 2025-02-10, 08:32:31 »

Thanks @maru and @TomG

I've installed both plugins, for AE et PS, and I'm able to access the render elements in both of them.

Thanks! 🙏🏻

26

[Max] I need help! / Re: Saving in EXR: Render Elements are not saved

« on: 2025-02-07, 04:35:54 »

Hi Maru,

No I want to open the elements in After Effects.

27

[Max] I need help! / Re: Saving in EXR: Render Elements are not saved

« on: 2025-02-06, 01:18:40 »

Does it work if you switch to another renderer? I am asking because, as far as I know, these saving options are controlled purely by 3ds Max.

No. I have the exact same problem with other renderers. No render elements are saved when I save the render as EXR, but they are correctly saved if I save in TIF for example.

28

[Max] I need help! / Re: Saving in EXR: Render Elements are not saved

« on: 2025-02-06, 01:03:42 »

Can you show the Render Elements set up, to see which ones you have added to the scene?

Here you are:

29

[Max] I need help! / Saving in EXR: Render Elements are not saved

« on: 2025-02-05, 03:22:50 »

Hi,

I want to render using the exr format. Unfortunately only the beauty is saved, not the render elements although I ticked the "Automatically Add/Remove Render Elements from Render Dialog" option.

Thanks for your help,

30

[Max] I need help! / Re: Volumetric optimisations

« on: 2025-02-01, 13:39:17 »

@lollolo

I guess the step size is the size of the voxels, meaning it reflects the acuracy of the volume.