I mapped with aiTriplanar and used displacement map, but the sides don't render correctly.

[Anonymous]

I used aiTriplanar to map plane to hide the repeats.

However, when I looked at the rendered results, I noticed that the sides of the deformed mesh were strange.

Probably because the side was shaded by aiTriplanar after it was deformed.

How can I make it look like a UV based render?

[lee_griggs]

Have you tried using blend?