Messages

16

[Max] Feature Requests / Re: Exposure-only override in Corona Camera

« on: 2022-08-02, 14:25:41 »

Does the below scenario describe the issue that you would like to have addressed?

You have an existing super nice tone mapping setup that you are happy with and you would like to use it globally for all shots in your scene, regardless if you are rendering from any camera or perspective view.
You would then like to have multiple cameras and adjust ONLY the exposure in each camera so that the overall tone mapping would stay the same for each camera view, but the exposure would differ?

17

[Max] I need help! / Re: Reduce noise in the interior scene

« on: 2022-08-01, 17:33:24 »

Noise level at 5% is a pretty high value. You can try with 2-3%. Generally, the longer you render, the better the quality.
Your image was rendered for only 25 passes. I would say 50 is probably the minimum to get good quality renders, and 100 is even better.

What seems to be the biggest issue? Is it some persistent fireflies in one specific area? Or is the image noisy in general? Maybe something else?

18

[Max] I need help! / Re: quiestion about strange glass object...

« on: 2022-08-01, 17:31:43 »

Not sure if this is intended or not, but this render generally lacks realism. The phone, the alarm clock, the curtain, they all look very plasticky. Adding some details such as roughness maps would probably help. Also, the lighting could be better. Right now most (all?) of the shadows are being case in one direction, away from the camera. This makes the scene appear a bit like an interior photo with camera flash enabled.

The shadow of the ashtray is behind it, that's why it looks photoshopped in place. I would try enabling some absorption as Romullus mentioned, maybe adding a bit of scratches using roughness textures, maybe even try with the GGX tail option (https://support.chaos.com/hc/en-us/articles/4954436712337) to make the ashtray appear more imperfect. :)

19

[Max] Daily Builds / Re: CoronaPattern playground!

« on: 2022-08-01, 17:17:33 »

just tested one more time both in V-ray and Corona, in V-ray we can randomize textures of the pattern object by using MultiSubTex and it doesn't work for me with CoronaMultiMap in Corona for some reason, fix it please

Can you explain some more how exactly this is working? Could you share a material editor screenshot + the result you are getting in V-Ray?

and by the way V-ray has random rotation parameter, very handy)

This is reported. :)

20

[Max] Daily Builds / Re: CoronaPattern playground!

« on: 2022-08-01, 14:57:44 »

Yes, as far as I can tell from testing if you have corona pattern on a surface - like a planked floor, you can't put a decal on the generated planks. If you switch off the pattern mod the decal will project fine on the base object but when the pattern is on the decal wont project on the pattern geometry. Does that make sense? I suppose it might be the sequencing so that the pattern should generate first and then the decal projected on after but I'm not even sure if its possible?

This seems to work fine as long as you disable the "use pattern material" option in CPattern modifier. Obviously that is a limitation, but maybe you can use it as a workaround to some degree (i.e. apply the pattern material to the base object).
I have logged it nonetheless because it would be a nice-to-have.

21

[Max] I need help! / Re: How to make scatter avoid pass out/trespass an area?

« on: 2022-07-27, 18:16:29 »

There are multiple ways.
For example, you can use the Slicer Material to cut the out of bounds grass - https://support.chaos.com/hc/en-us/articles/4956761514897-How-to-use-the-Corona-Slicer-Material-3ds-Max
Or you can drive the Scatter density/scale using Distance Map - https://support.chaos.com/hc/en-us/articles/4528348048017-Corona-Distance-Map-

22

[Max] Daily Builds / Re: CoronaPattern playground!

« on: 2022-07-27, 17:47:55 »

Thanks Maru. Is it possible to add a request for multiple node geometries? For example the ability to have a few different grass patches rather than only the one?

Yep, we will log other ideas from this thread too. :)

23

[Max] Daily Builds / Re: CoronaPattern playground!

« on: 2022-07-27, 17:41:47 »

Multiple feature requests are now logged for our wizards to review. No guarantees or promises yet!

- rotate the whole pattern without having to adjust base object UVWs
- randomize pattern tiles rotation
- other randomizations like in UVW Randomizer (scale, offset)
- smooth normals along slices ("weld seams")
- ability for the pattern segments to overlap with each other instead of being sliced

24

[Max] Daily Builds / Re: CoronaPattern playground!

« on: 2022-07-27, 15:23:53 »

Also if therfe is anyway for them to support decals that would be great. No doubt very tricky!

Sorry, but that sounds a bit cryptic to me. Can you explain what exactly you mean?

25

[Max] Bug Reporting / Re: Multimap and Randomzer Bugs

« on: 2022-07-27, 11:52:10 »

Hi, sorry for the delay. Contacting you because at least one other user reported a similar case, but we were not able to reproduce it.
Do you have any scene where this happens in the pre-V8 state? (created and saved in V7, not in V8)
If so, can you please contact us here and attach your scene? https://support.chaos.com/hc/en-us/requests/new

26

[Max] General Discussion / Re: Corona 8 round edges

« on: 2022-07-26, 11:58:37 »

We are thinking about bringing the legacy checkbox back. Can't promise it right now, but will keep everyone updated.

Meanwhile, here is a workaround that works in V8:

RoundEdgesLegacy-all.ms - enables the legacy option for all Corona Round Edges maps in the scene

RoundEdgesLegacy-selected.ms - enables the legacy option for one Corona Round Edges map currently selected in the Slate Material Editor

27

[Max] I need help! / Re: Lines Flicker and pixel problem

« on: 2022-07-25, 17:03:32 »

Hello there
The render I got as 7000x9000 pixel 300dpi tiff that I show below. When the customer wants to put it on the website and shrinks it to 1080px, there is a flickering problem in the vertical lines. How can we shrink an image of this size without flickering? Should we do it from the render settings or can we solve it with photoshop?

Do you mean that you are rendering a scene with Corona at 7000x9000 resolution and then re-rendering the same scene in Corona at 1080px?
Or you have an image rendered at 7000x9000 and you are downscaling it to 1080px?

If it's the latter, then what software are you using for downscaling?

28

[Max] Feature Requests / Re: Vray Enmesh compatibility

« on: 2022-07-25, 16:58:36 »

Have you tried manually replacing it with the Corona Pattern Modifier? https://forum.corona-renderer.com/index.php?topic=37437.0

29

[Max] Bug Reporting / Re: HDRI/Environment sampling causing Shadow artefacts

« on: 2022-07-25, 08:55:03 »

We will look into this. Something is definitely wrong.

nice! thank you very much

To be honest I thought we'd established that it was a problem already, as per George K's post.  My post was merely to see if there was an update on the investigation rather and to provide a further example of the already identified problem.

Yes we have, and I thought we were looking at something else later. So I just wanted to confirm - we have the issue logged and we will properly look into it.

30

[Max] Bug Reporting / Re: Volume Materials and opacity light sources Produces wrong results

« on: 2022-07-22, 16:58:17 »

I may be wrong, but it looks like "Transparent materials seen through global volume material (volumetric fog) may look incorrect." described here, the example image with fire:
https://support.chaos.com/hc/en-us/articles/4528311915025-Known-bugs-and-limitations

Can you check if the suggested solution helps in your case?