Synced Normal Maps

Unreal 4 would greatly benefit if its tangent basis was synced to Mikk T space or another standard. This would result in an increase in flexibility when unwrapping models and reduce the amount of smoothing groups required to get the best results.

This mesh shows how not having a synced tangent basis causes distortion and artifacts. While this may not be terrible, this is an open issue.

You are in luck, just changed this in the latest version:

New: Tangent bases for static meshes
are now computed using MikkTSpace.
Special thanks to JedTheKrampus for
the GitHub pull request.

Thank you very much for pointing this out! I hadn’t gone through the release notes yet, so this is some great news.