Paint details terrain alpha issue white borders on grass alpha

[Kas]

I have an issue with terrain paint details that hasn’t seemed to be resolved yet. The issue is when you start adding a lot of paint details grass ( non billboard ) where when the engine decides to combine all these textures into a atlas and no matter how your alpha channel is set on these textures it causes a issue with a white border being around grass alpha edges. I have tried a lot of different things to resolve the issue but none are working. I can tell its a atlas issue since when I delete a paint details object from one terrain it will start effecting paint details on my other terrains, guessing when the compression happens it shifts some pixels over that are out of my control and creates this white border on certain grass. One solution that partially worked was using targa files with a custom alpha layer, no compression, no mip maps but when then I still see the issue from time to time. It’s driving me a little crazy and feel like this will stop my game release, just looks so bad. Has anyone encountered this issue and what was your solution?