Corona Renderer Forum

Corona Renderer for 3ds Max => [Max] I need help! => Topic started by: SHARben on 2021-04-09, 12:04:15

Title: Rafraction IOR looks not correct in Reflection channel
Post by: SHARben on 2021-04-09, 12:04:15
Hello everyone,

is any body have seen this Issue, that Glas Material in reflection looks not korrekt? Is looks like glass in reflection has IOR 1. https://i.imgur.com/92h9TSk.png
I hope you can help me to fix it.

Thank you
Title: Re: Rafraction IOR looks not correct in Reflection channel
Post by: romullus on 2021-04-09, 16:00:04
That looks strange indeed. Maybe you are using some overrides, or ray switchers?
Title: Re: Rafraction IOR looks not correct in Reflection channel
Post by: Avi on 2021-04-09, 22:31:30
Hi,

Can you let us know what version of 3dsmax and corona you are using? I quickly did a small test using 3dsmax 2022 with Corona hotfix 1 & did not spot any such problems.

attached is a screenshot for your review.

Regards,
Avi
Title: Re: Rafraction IOR looks not correct in Reflection channel
Post by: GeorgeK on 2021-04-09, 23:02:50
Hello everyone,

is any body have seen this Issue, that Glas Material in reflection looks not korrekt? Is looks like glass in reflection has IOR 1. https://i.imgur.com/92h9TSk.png
I hope you can help me to fix it.

Thank you

I am afraid this is an old known issue which is present if you try to achieve fake glass (no caustics). It has to do with glossiness states, and/or the lack of caustics. To resolve this, simply enable caustics on your glass material or resort to 1.0 glossiness for your floor material. We plan to address this in the near future.

@Avi this is related to the following: (Report ID=CRMAX-436)

Title: Re: Rafraction IOR looks not correct in Reflection channel
Post by: SHARben on 2021-04-12, 11:26:22
Thanx all for quicjk reply. Yes, turn on caustic did fix this issue, but for our prozess it's not are solution, be course of rendertime. I'm looking forwart to Update where this issue will be solved. Thank you again.
Title: Re: Rafraction IOR looks not correct in Reflection channel
Post by: GeorgeK on 2021-05-11, 10:49:47
The inconsistency between glossiness/roughness values has been fixed as of the latest Corona 7 DB of 10th of May,2021. Please feel free to check if it resolves your issue, you can download it here: https://www.dropbox.com/sh/mswauuv1afec8am/AAA5OKrd_QujokDM3mxQ7S40a

Cheers,