Corona Renderer 8 for 3ds Max - Daily Builds Discussion

[cjwidd]

Nice!

[marchik]

Today I discovered 2 strange moments:

    1. As far as I know Corona uses OpenGL format of normal maps, considering this, I exported normal maps from Substance Painter in DirectX format and inverted the green Y channel, but in the last daily build I found that now the surface looks correct if I leave the green channel without inversion and it looks wrong if I invert it. Am I missing a nuance or is this a bug?

    2. In the last daily build, the Specular parameter does not work correctly, if you set the value to 0.5, then the appearance of the shaderball does not coincide with that when using IOR 1.5, in addition to this, now using the specular parameter it is impossible to completely disable reflections by setting Specular to 0, all values ​​are less than 0.5 look the same. But at the same time, if I add a black color map, then the reflections are turned off as before, I checked on version 7 stable and there it clearly behaves differently.

[cjwidd]

Eh, I've thought for years Corona Renderer uses DirectX?

Pretty sure you can disable reflections by setting IOR = 0 with 0.0 gloss / 1.0 rough

[marchik]

Eh, I've thought for years Corona Renderer uses DirectX?

Pretty sure you can disable reflections by setting IOR = 0 with 0.0 gloss / 1.0 rough

I suspect I can be wrong about Corona's native format of the normals, but I would be glad to hear confirmation from the development team to close this question.

As for the specular parameter, yes, I understand that I can turn off reflections using 0 ior, I don't even need to touch the roughness parameter, but before I could do it using specular mode and now the behavior of this parameter when entering numeric values ​​has definitely changed in the latest daily build

[cjwidd]

[...] 3ds Max by default uses DirectX (-Y) normal maps, so Corona Team wisely decided to stick with that as default [...]

[marchik]

[...] 3ds Max by default uses DirectX (-Y) normal maps, so Corona Team wisely decided to stick with that as default [...]

yeah, got it, so it is a bug in my brains :D but the second question is still on the spot

[GeorgeK]

    2. In the last daily build, the Specular parameter does not work correctly, if you set the value to 0.5, then the appearance of the shaderball does not coincide with that when using IOR 1.5, in addition to this, now using the specular parameter it is impossible to completely disable reflections by setting Specular to 0, all values ​​are less than 0.5 look the same. But at the same time, if I add a black color map, then the reflections are turned off as before, I checked on version 7 stable and there it clearly behaves differently.

Hi and thanks for reporting this, it seems like something was broken, reporting it.

(Report ID=CRMAX-996)

[Ondra]

There is no native format of normal maps, it is a matter of very simple to change processing in single place (NormalMap). Corona AFAIK uses what 3dsmax uses, or what somebody requesting the feature originally recommended

[ronaldjung]

I don't know if this has being already reported.
But using the corona-8-3dsmax-daily-2021-09-21 after the first time I initialize render (or preview render) the viewport gets very slow in the navigation (pan, orbit, etc).
Returned to 7.1 to avoid this behavior.
Ronald

[rowmanns]

I don't know if this has being already reported.
But using the corona-8-3dsmax-daily-2021-09-21 after the first time I initialize render (or preview render) the viewport gets very slow in the navigation (pan, orbit, etc).
Returned to 7.1 to avoid this behavior.
Ronald

Hi,

Could you provide an example scene? Also which version on 3ds Max are you using?

Instuctions on how to send a scene to us can be found in my signature.

Cheers,

Rowan

[ronaldjung]

Hi, rowmanns.

I downgraded the scene to the Corona 7.1 and the slow persist.

I'm using the 3ds Max 2022.2 (thinking about it now, this started after i've updated 3ds max)

The same file in the 3ds Max 2021 dont reproduce this behavior.

I will send the file.

Ronald

[ronaldjung]

Uploaded the file with the dropbox link and in the Private Uploader, name:
1632849454_Loft-Sibipiruna-Linea-Haus-Versao-A-13.max

The dropbox file have all the assts (3ds max archive file).

See ya

[rowmanns]

Hi, rowmanns.

I downgraded the scene to the Corona 7.1 and the slow persist.

I'm using the 3ds Max 2022.2 (thinking about it now, this started after i've updated 3ds max)

The same file in the 3ds Max 2021 dont reproduce this behavior.

I will send the file.

Ronald

Hi,

Thanks for uploading the scene. However if it is indeed caused by 3ds max as you speculate I'm not sure how much we can do about it.

However I'll take a look and see. We'll let you know when there is some more info.

Cheers,

Rowan

[ronaldjung]

Hi, rowmanns.

As I told you yesterday, the problem persisted after I had reinstalled corona 7.1 (without uninstalling the daily build)

Today I tried to uninstal Corona and then install it again (7.1).
The problem is not happening anymore.
It seems that was something related with the daily build...
I'll keep using 7.1 by now.

Thanks

Ronald

[rowmanns]

hi i have shared my files on dropbox - email id - deniskhiroya@icloud.com

Hi,

This is fixed in the latest daily build. https://forum.corona-renderer.com/index.php?topic=33839.msg190524#msg190524

Thanks,

Rowan