Decal Black alpha channel showing on edges

Rendering
1

Hi,
I thought I’d try useing decals in Rhino to save a trip over to 3DCoat.
All works as advertised, however I am finding that the edges of anti aliased transparent decals have a border where the underlying black alpha channel is showing through. Note that my decals are PNGs on a transparent background - Rhino is adding the black alpha channel.
See attached.

decal border
decal border1087×617 62.3 KB

This only happens in the rendered viewport - raytraced cycles does not do this.
Cheers, Steve

3

Thanks @Steve_Howden - I can reproduce the issue and I’ve made a YouTrack item: https://mcneel.myjetbrains.com/youtrack/issue/RH-83717.

-David

4

Thanks David