UE5.3 Converting StaticMesh To SkeletalMesh Issue

Hello , I have a very strange issue and i think it is bug;

I am working on a marketplace SkeletalMesh asset. Its textures are baked, and i am working on make this a modular and saperate materials for potential customisation mechanic.

1- Material set up : I converted the skeletal mesh to static mesh and with modelling tools, I set new materials. From 1 material it is now 6 materials.
2- Converting SM to SK :
2.1 First I right clicked the static mesh and converted to a skeletal mesh. Then I chose the skeleton and rig is working. But The new materials are not working. there are 6 materials but converted SkeletalMesh is using only the first material. But in static mesh, they are working. Somehow unreal loses material data while converting the mesh. So i tried another way
2.2 I exported the static mesh which i set the materials. Then imported again . This time materials are working but there is another problem. The new skeletal mesh lost its data and i can never use my skeleton. I have to it again. Ofc i can do it but this time I have to follow this pipeline for 100 clothes maybe.

I am sorry i wrote it long but what i see on google, there are no one has this problem.
Thank you for help .

Did you ever find a solution to this? I’m trying 2 ways to convert my static mesh to a skeletal mesh and neither way is working properly, basically just like you explained:

Method 1: Right click static mesh → Convert to Skeletal Mesh. Works fine except the material slots don’t work properly. They are listed but only the first one is used on the entire mesh.

Method 2: Export the static mesh as FBX and reimport, generating a skeletal mesh. The materials work fine here but the mesh itself doesn’t look the same, it almost looks smoothed. Oddly enough when I use the modelling tools on the new skeletal mesh, I can see the mesh in its original format like the static mesh itself is still intact but when I confirm the changes or go out of modelling mode, it returns to its smoothed appearance.

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I’m facing the same issue. Must be a bug.

You need to enable the skeletal mesh editing tools plugin

then you can right click and choose Convert to Skeletal Mesh

GO to modeling mode then attribs, click normal after that sure the ( fix inconsistent normals) is ticked