Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: grafichissimo on 2016-07-18, 17:53:10

Title: Glass blocking the light
Post by: grafichissimo on 2016-07-18, 17:53:10

Hi guys,
I am not sure this is a bug, anyway here is my problem.
As you can see in the 2 screens grab I have a different behavior using the normal glass and the thin (no refraction)glass.
It looks like the light can't go through the NORMAL glass, why that is happening?

Cheers.

Title: Re: Glass blocking the light
Post by: PROH on 2016-07-18, 18:10:17

Hi. Not sure I fully understand your problem, since I can't see any difference on the two images (expect from your writing). But on your "wrong" picture, your glass is having diffuse set to grey with value 1. Try turning diffuse off (set it to 0).

Title: Re: Glass blocking the light
Post by: grafichissimo on 2016-07-18, 18:38:33

Hi Proh,
if you looks better you can see that in the right version the light goes through the glass, you can see the blurred shadow of the glass frame on the floor.
In the other case you can see the light blocked by the glass, can you notice the different color of the floor?

Is not that the problem anyway, I have already try everything but, it looks is not working, very strange I would say.
Maybe is something related to the normals, I am checking it now.
I have imported the geometry from Revit.

cheers.

Title: Re: Glass blocking the light
Post by: Frood on 2016-07-18, 20:03:21

I´m not 100% sure because of the grey diffuse in the second picture consuming reflection but apart from that - doesn´t it looks (again) like the world famous reflection behind refractive materials flaw (adressed in 1.5 dailies)?

https://forum.corona-renderer.com/index.php/topic,12508.0.html
("Reflections of light seen through solid glass may appear dark")

It may be not as obvious because the light doesn´t come from a strong, focused source like a sun/light but from a backplane and the glossiness is lower.

Good Luck

Title: Re: Glass blocking the light
Post by: PROH on 2016-07-18, 20:14:05

OK, now I see it. Well grey in diffuse map with a value of 1 is definitely wrong (for glass), and might block some light, but besides that Frood might be right about the known issue with "reflection behind refraction".

What version of Corona are you using?

Title: Re: Glass blocking the light
Post by: maru on 2016-07-19, 14:11:13

@grafichissimo

This looks like the "black highlights" problem indeed. It was fixed in the latest daily builds. See: https://coronarenderer.freshdesk.com/support/solutions/articles/5000570015

Another thing is that your material editor slots look very strange. Are you using some low quality setting?

Title: Re: Glass blocking the light
Post by: Ondra on 2016-08-20, 09:48:30

Can you try the latest daily? There is a fix for the black highlights

Title: Re: Glass blocking the light
Post by: Ondra on 2016-09-16, 16:04:32

probably fixed