How can I round all of the edge of an object?

Bevel or chamfer , in the real world, sharp edges are quite dificult to achieve, this means expensive, and also very dangerous, that´s why you´ll never find them.

Oops. I forgot to mention that I'm using the 3D modeling application Blender.

Use the modifier subdivision surface!

In vray, redshift, arnold you can also round edges in shader. blender might have something similar. https://vimeo.com/194177504

smooth

倒角