How to make smooth edge of box with materials? I have the following box:



What I would like to achieve is to have a smooth edge in the top-right corner, so it looks like a curve.

What I've tried is to make the faces really small, and then apply my red texture to just a few of them, but it still looks hacky.



Anyone sitting on any nice techniques for achiving something like this:



Notice how the black color is kind of rounded around the corner
Why not do this with textures?

Simply make a black-and-white image texture, and use it to switch between two different material node layouts. It'll be better for performance as well, because there's fewer faces.