Bevel Parts Plugin
This plugin has already probably been made, but oh well. It utilizes the same mesh that R6 body parts use to apply a bevel like effect to parts!
How to use:
Simply select a part in roblox studio, then click the bevel parts plugin button. It should automatically bevel the part!
Drawbacks:
You cannot utilize materials on the rounded part anymore since this utilizes special meshes. Studio won’t let me use mesh parts
Link:
https://www.roblox.com/library/6869029308/Bevel-Parts
Edit: Fixed the plugin icon in studio. The icon for the website I believe is still uploading.