How can i fix "ALL SIDES" meshes?

[hyunjungseul]

Hello guys, so... I'm having problems with parts of faces that are telling me they are "ALL SIDES" instead of having a number indicating which face is specific, I really wanted some solution. I've tried to upload the mesh all together and also all separately, I've tried to delete doubles and I've also tried to invert normals but still has "ALL SIDES". If you can help me I will be more than grateful!

[Wulfie Reanimator]

24 minutes ago, hyunjungseul said:

Hello guys, so... I'm having problems with parts of faces that are telling me they are "ALL SIDES" instead of having a number indicating which face is specific, I really wanted some solution. I've tried to upload the mesh all together and also all separately, I've tried to delete doubles and I've also tried to invert normals but still has "ALL SIDES". If you can help me I will be more than grateful!

You need to assign more than one material to the model if you want to have more than one "face" in SL.