Hello Developers,
I am creating an UI Design for a game but I keep running into the same problem. I do UI’s in Photoshop, I tried erasing every corner, but still the white lines appear like here: 
How can I possibly fix this issue? What is the cause of it? Is it the Roblox Studio that does this? Please let me know.
I think this is the same problem I had before, I found out I could use this tool: Online Javascript Editor
and run my images through it to remove some outlines. I do not know it it will work for you but its worth a try.
You’re a life saver man, thank you. Absolutely noone knew how to fix this, thank you so much. 
omg tysm, this still works! i’m not the op of course but still thanks so much