Arnold renders black blur around transparent planes (pngs are pixelated)

[Anonymous]

Hey! 

I'm trying to render a Minecraft scene (obj). But when rendering the grass planes, I encounter some weird problems. I'm using aiStandardSurface so I can work with Arnold and have my Color and Normal Map Node set up correctly:

- Filter Type under Attributes turned off (avoid blur)

- Filter Type under the Arnold tab turned to "closest" (gave me the best output I got until now)

- Opaque turned off in the shape node

My grass planes (and everything else that has some transparency to it) have a weird black blurry outline around them. It's not related to the textures since the legacy engine renders everything without any problem (using phong). 

How can I avoid these blurry outlines? I've tried pretty much every setting, but is there something hidden in the Arnold settings that "blurs alpha channels" when the textures are pixelated? 

Thanks in advance! Hopefully there's an easy fix for the problem that I overlook

[Anonymous]

Did you get it working?