Lost Lightmap on saved project.

Basically after I saved my project and reopened it I lost the Litghmap, No shadow apart the ones created by the sun.
And I have got some problem on the ceiling too.

Does anyone know what happened?

Hello, the same here, I reckon that it’s a bug in relation with refresh. You can solve that, first zooming out the scene, then zooming in, and now you’ll see your lightmaps correctly.

It might still be streaming the lightmaps in

Cheers guys, Is something related to my graphic card, I am using a Quadro K5000, not exactly the best for this kind of job.

Probably not, the editor often has a few quirks with textures/lightmaps when first opening a project. Moving around is typically enough to fix it. Often times I just hit simulate in viewport to fix these things.