Skeletal Mesh has blocky hard edges all over its surface (screenshot attached)

nimbusstev
Thu, 19 Feb 2015 05:15:00 +0000
Rendering

I swear I’ve come across this issue before, but I can’t remember what the cause was or how to fix it. Basically, ugly hard-edged blocks are appearing all over my skeletal mesh, like so:

Through troubleshooting, I’ve narrowed down that…

It’s not a texture / normal map issue
as the hard edges are visible even
before applying a material

It’s not caused by poor UV mapping,
as it is occurring inside cleanly
mapped areas

There isn’t some sort of rogue UV set
hidden in the file

There is no funky geometry hidden in
the mesh

Normals are all facing the same
direction, everything looks good with
backface culling turned on in Maya

Tried unlocking the normals in Maya
and softening the edges again

Tried multiple versions of the FBX
exporter

The issue is only present in Unreal -
the edges look fine upon reimporting
the FBX into Maya

The issue does not occur when
importing the file as a static mesh
instead of skeletal mesh

Resetting the weight painting to the
default weights does not fix the
issue

All those things considered, I can only assume it has something to do with it being a skeletal mesh. I’ve ruled out all the normal suspects in terms of normals and UVs, so I’m not really sure what is causing this. Has anyone else ever experienced this before?

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