white edges with alpha channel artifact

This seem to be a file format issue.

Tiff works fine but PNG and worse PSD show heavy white outline artifacts.
But the alpha channel is clean. This is made in Illustrator.

Somebody knows why this happens?

While TIff works the file format is LARGE in file size.



Did you try enabling Premul in the texture image settings?

I bet the alpha channel in the TIFF is already premultiplied, PNGs are not.