Long standing Glossy Refraction in Alpha issue.

[brobins]

Hi there,

Its my understanding that there is a fairly long standing issue with Glossy Refractions not having any effect on the Alpha channel in Maya. I have found a kind of workaround but it is not proving ideal, I wonder if you could offer any ideas on how I could further improve our workflow here as we are quite reliant on the Glossy Refractions in Alpha on one particular project.

The solution is to use the 'BRDFVRayMtl' rather than the standard 'VRayMtl'.

The problem is that we cannot achieve the same result using 'like for like' settings between the 'BRDFVRayMtl' and the 'VRayMtl'.

Would it also be possible at all to using the standard 'VrayMtl' and only use the 'BRDFVRayMtl' as a Refraction override on the shader as we have been unsuccessful in getting that to work.

Any input appreciated.

Thanks,

Ben @ Framestore

[vlado]

Would it also be possible at all to using the standard 'VrayMtl' and only use the 'BRDFVRayMtl' as a Refraction override on the shader as we have been unsuccessful in getting that to work.

You can use a VRayBlendMtl material where the base material is BRDFVRayMtl, and the coat material is a regular VRayMtl.

Best regards,
Vlado

[brobins]

Just wanted to confirm that this issue has been fixed in the latest nighties, (both 2.4 and 3.0).

Thanks

[vlado]

Very well then Let us know if there is anything else.

Best regards,
Vlado