![](https://live.cdn.renderosity.com/forum/comments/4143209/file_503177.jpg)
Here is how I did it with bevel modifier. I add the modifier and adjust with and segment. Under Limit Method I pick weight. I go to edit mode, and select my edges. I press ctrl E and pick Edge Bevel Weight. I move my mouse to give edge weight. It makes this result on cube. Try it to work for you.