3D Extrude and Bevel effects in Illustrator

[Ikosaeder]

Hello, designers. I need some help with my Illustrator. For some reasons it doesn't create proper vertical edges for Isometric Sides options. Any ideas why? Original shape was perfect square 100*100. "3D->Rotate" gives a same result.

{Renamed by MOD}

[Ton Frederiks · Accepted solution]

You need to enter a slightly different angle than the default angle.

See the correct answer by JET:

https://community.adobe.com/t5/illustrator/3d-rotate-isomatric-doesn-work-properly/td-p/8731093?page...

[Ikosaeder]

Wow, thank you so much! such an interesting solution and it's explanation

[Ton Frederiks]

Good to hear that helped.