Round Edges

[Adam Trachtenberg]

Bevel tool should work. What version of Cinema are you using?

[Brian Jones]

if your cube was still only 1 segment for each face you can get strange results, even with Fixed Distance in the bevel tool.

Try segmenting the cube faces to get more even lines. Some pictures for a simple example, your sphere has more segmentation so maybe just 2 segments isn’t enough.

uneven line length

more even line length

better bevel

[Adam Trachtenberg]

I find it’s generally best to melt all of those lines before beveling, though it doesn’t seem to make much difference in this scenario. What could help is selecting the outside edge loop of the bevel and manually breaking phong shading.