Feature Request - alpha shadows per material

[SSmolak]

It would be great if alpha shadows Kernel settings will be set per material basis. In my observation, most of the vegetation material leaves which use opacity masks looks better in the terms of shadowing if alpha shadows is turned off. But it can cause problem with other materials if it is set off globally.

EDIT : it looks that this can be simulated with even more controls by using Ray Switch node ( Camera ray input ) connected to Opacity channel.