White edges on transparent pngs

Hi all, despite tweaking export settings in Illustrator & Photoshop, I cannot import a transparent png in SU without a faint line where the document edge is.
This is very frustrating as I cannot render these images with this issue.
Does anyone have any suggestions or workarounds?

Hi, i am not sure if it is the solution you want, but i have a video about rendering png images without border line using Vray.

Try disabling anti anti-aliasing