Migrate Dx12 gpu baked scene to Dx11 scene - All black

Hi, I properly baked a scene with Dx12 raytraced gpu lightmass, I migrate the result baked scene in another project , same version, but Dx11, no raytrace.
My scene opens black.

If I check all the render pass, in lighting only, its all black. other pass are fine.
Is there something to do to migrate the baked scene so it renders properly in a dx11 project without having to rebake everything?

Oh Just found the answer myself.
I enabled Virtual textures and the Dx12 projects. Lightmaps were encoded using VT. Enabeling virtual textures in my other project allowed to visualise lightmaps properly.