View Full Version : Exporting FBX with vertex normals?

02-14-2014, 05:57 AM
Hi All,

This is probably quite an old topic but having searched around I've found no real solution.

I'm creating game assets for unity and I'm wanting to export an fbx object which has a vertex normal map.

As you can see from the image the difference between with and without the vertex normal map is huge so I'd like to be able to replicate this mapped object in unity, without having to separate the object into separate pieces to create hard edges.

Is is possible to export this data with fbx?

I've used Lightwave for game asset creation for a while now and it really does seem like its behind the times when it comes to vertex normals and soft/hard edges.

I'm hoping that this will be resolved in future releases.


02-14-2014, 07:51 AM

Short answer, you can't define smoothing groups in LW, if you need really sharp edges on a curvy surface you must detatch the edges you want to make sharp. I can usually get by just defining the smoothing angle inside unity, (import settings) between 10-40 smoothing works for most stuff.

02-19-2014, 05:35 AM
I'm not sure if FBX supports vertex normals. Try export using the obj format instead.

02-19-2014, 05:49 AM
Seems like vertex normals is supported by the FBX format, but LW does not support vertex normals for FBX, it only supports vertex normals in OBJ and LWO. Time for a feature request!

02-19-2014, 09:23 AM

02-19-2014, 01:42 PM
LW doesn't export the vertex normal map, but it does seem to export the vertex normals properly since version 11.6 I think. In 11.5 only Layout had it right.