vray matte surface reflection not showing

[colorbleed]

Hi,
I have an issue with v-ray not showing the actual reflection of an object when using matte surface (alpha contr. -1) in an object properties ser. Same for the MtlWrapper.
The reflection shows up in the alpha channel but has no RGB values, basically acting like the shadow would (or reflection occulsion).
Did something change in Vray Next update? This was never an issue before.

vray_adv_41202_maya2019_x64

Thanks

[Zdravko.Keremidchiev]

Do you see the reflection if you change the Background color in the Environment overrides to grey in example?

[colorbleed]

Hi Zdravko,
No then I just see the reflection occlusion.

[Zdravko.Keremidchiev]

Can you attach or send us a simple scene with that issue.

[colorbleed]

Hi,

Here's a scene https://we.tl/t-yj9R1RQqER

I've tested a similar setup in maya 2018 with older v-ray version and there it works as expected.

Maya 2019 vray update 1.1 (v4.12.02.000001 jul 2) https://gyazo.com/54e4d658cf06e970b145a6ac3025ddc8
Maya 2018 vray hotfix 2 (v4.04.03.000010 25 feb) https://gyazo.com/5afe2b7db83fe14ac42f01a4da930863

Cheers

[colorbleed]

I get some crazy artifacts too as soon as I add more light to the scene. Have to turn GI off to make it disappear...

[Zdravko.Keremidchiev]

Is that the same scene or another one?

[Zdravko.Keremidchiev]

About the reflection matte issue, we are working on it now. I'll let you know as soon as we get the fix in the stable builds.

[colorbleed]

Is that the same scene or another one?

This is a different scene for a production shot we're working on now

About the reflection matte issue, we are working on it now. I'll let you know as soon as we get the fix in the stable builds.

OK thank you. Any idea about time-frame?

[Zdravko.Keremidchiev]

get some crazy artifacts too as soon as I add more light to the scene.

Does Image sampler affect the issue? Lower Threshold or higher Min or Max subdivs?

Any idea about time-frame?

It shouldn't take long

[colorbleed]

Does Image sampler affect the issue? Lower Threshold or higher Min or Max subdivs?

Only reduces it slightly. When turning off 'receive GI' the artifacts disappear.

[Zdravko.Keremidchiev]

What GI solutions are you using? Do you get artifacts with BF+BF?

[colorbleed]

Hi, I use BF+LC. BF+BF has same issue.
Strange, but the artifacts only show up when I have an image loaded in the environment override background slot.

[Zdravko.Keremidchiev]

Can you send us the scene?

[colorbleed]

Sure, dressed it down but bug remains: https://we.tl/t-HNmDnadnBY