VrayMtlWrapper- Matte Material Alpha Issue

[FaustoDeMartini]

I'm not sure if this issue was reported already, but I'm seeing a problem when using the VrayMtlWrapper as a matte surface. The issue is described in the image attached, I'm not sure if one of my settings can be causing this.

As you can see the shadow I was supposed to get is very soft (almost look like Ambient Occlusion, but only the "Shadows" option I get this effect) but as you can see when applying the VrayMtlWrapper I get this weird hard shadow that is not even being cast by the light, since the objects are in shadow:

[JonasNöll]

Can you backtrack if this really is a shadow, and if yes which light is causing it?
Could you also set the reflection, refraction and GI amount in the matte properties to 0 in order to eliminate possible issues.
Do you get the same issue if instead of a MaterialWrapper you define the matte object in the V-Ray object properties instead?

[hermit.crab]

Best you send the scene to support@chaosgroup.com so we can take a look. Mention this thread in the e-mail, along with your V-Ray and host platform versions.

[FaustoDeMartini]

Can you backtrack if this really is a shadow, and if yes which light is causing it?
Could you also set the reflection, refraction and GI amount in the matte properties to 0 in order to eliminate possible issues.
Do you get the same issue if instead of a MaterialWrapper you define the matte object in the V-Ray object properties instead?

Thanks Jonas, sorry got busy here but I will try these steps!

I will post the results here.

-Fausto.

[FaustoDeMartini]

Best you send the scene to support@chaosgroup.com so we can take a look. Mention this thread in the e-mail, along with your V-Ray and host platform versions.

Sounds good, I will prepare a smaller version of the scene.

Thanks Aleksandar!

-Fausto.