Exporters: Add compatibility with Blender’s custom split normals

[MaximeOrlandi]

This functionnality would save us graphic designers a lot of time and a lot of polys

https://en.blender.org/uploads/9/9e/Average.gif

Thank you !

[kcoley]

@MaximeOrlandi thanks for the reference gif! I'll look into this.

[kcoley]

Hi @MaximeOrlandi , I was unable to find the Normal Tools from your reference gif. Is it built into Blender or is it a Blender addon? Currently we don't have support for any addons. Do you have a sample fbx file that has been modified?

[Vinc3r]

I don't know the addon MaximeOrlandi use, but you can try modiying normals with YAVNE for example, or more simple, use the default Normal Edit modifier.

The point is to get custom split normals data into the mesh:

[kcoley]

@Vinc3r thanks for the additional info. I'll verify with Blender's default normal edit modifier. If split normals are not being exported, it may be a bug in the exporter.

[kcoley]

@MaximeOrlandi @Vinc3r heads up that this will take me a while to get to since I've been resolving some bugs with the other exporters, but hopefully I'll get to this soon!

[MaximeOrlandi]

Great ! Thank you !

[Palmer-JC]

Custom split normals has been added on the EEVEE branch of the repo.