Light and Shadow for an Alembic Object ? Need help

MannyG

Hi,

What is the correct or best settings for an Alembic Object ?

I did this little animation of a "Curly Cube" but the light and shadows are really weird. How to fix this ? Need to export as FBX ?  Some faces don't be affected by the light, what's wrong ? Need help please.

Some captures

Obscura

Seems like new vertex normals aren't calculated. Dunno how to fix it though.

MannyG

...and I need to fix it : )

Hope somebody will help me.

Obscura

Have you tried changing the import normals setting, to calculate the normals?

MannyG

I need to import as Skeletal. I read this, on the UE4 Doc : 
What do you think ?

When importing as a Skeletal Mesh, if your animation has big normal delta you may run into issues getting correct looking normals. This is a known issue caused by the way morph-targets can alter the face/vertex normals. As a workaround, you can bypass this problem by using the (experimental) skin cache feature.

To enable this, add the following to your ConsoleVariables.ini file:

r.SkinCache.CompileShaders=1
r.SkinCache.Mode=1
r.SkinCache.RecomputeTangents=1

This should recompile shaders the next time you start the editor. When you open up the Skeletal Mesh asset you should be able to tick the Recompute Tangent option for each material/section.

Alembic file importer Doc:

https://docs.unrealengine.com/latest/INT/Engine/Content/AlembicImporter/#importasskeletal

Obscura

This could work. Try.

MannyG

I tried yesterday evening and that solved the problem : )

Thank you 

Mortimerio

Thank you very much!!! This completely solved an issue we had.

Kegs

OMG!  MannyG  It works - Thank you!!  Thats been so much hassle, couldn't find answer anywhere until now

Kegs

OMG!  MannyG  It works - Thank you!!  Thats been so much hassle, couldn't find answer anywhere until now

Obscura

Be aware that enabling this option will make alembic shade correctly, but it will also make standard skeletal meshes shade incorrectly sometimes.