I'm working on VR project with a world space canvas for UI. It is using the above dropdown / input fields, but they have an obnoxious aliasing problem along the light colored border that I can't figure out. The field image is using a square 512x512 9-sliced texture. The texture consists of a large outer alpha padding area, a drop shadow, the bright rounded rectangle border, and the inner blue fill. The texture is using mip maps. I've tried playing with texture resolution, mip map bias, and texture filtering settings, but none of them help the aliasing. I've found that if I make the texture a similar aspect ratio to the field (e.g. 256x1024) instead of square it will fix the aliasing. But this somewhat defeats the point of using 9-sliced images. Does anyone know what the source of this border aliasing artifact might be, and what techniques exist to deal with it?