can't copy a mtl from the blend mtl to the top level

[Bigguns]

I tried to copy the base material and paste it on the vrayblend, and the paste option don't appears.

[Bigguns]

it work's by drag and drop though, but not copy paste

[tanya_to]

Hey Bigguns, Unfortunately, this is a limitation of the QT based UI, and it's the same for Layer Shader in Arnold.