Thanks to a comment by a reader (Shakeel sahab) I found out more about the painting hanging in the main hall of Lahore Museum, and it seems it has been literally destroyed because of the incompetence of the authorities!
From the link above:
But the inheritors of the artist’s majestic work have not been protective of Sadequain’s exceptional legacy. Rainwater seepage, heat and humidity are rapidly destroying the mural. Termite colonies have infested the wooden frames and canvases. A close inspection reveals that the edges of the paintings, which are folded over the wooden frames, have been most directly affected. Termites have eaten away at the canvases, leaving the paint layer hanging almost without support, and liable to break away at any moment. Large tears are also noticeable in many places.
Yes, those are termite nests hanging from this masterpiece! FOR FUCKS SAKE! And that COCKSUCKER is buying another fucking Gulfstream jet worth 60 million bucks???
Do we really have the right to call ourselves a nation when we can't even safeguard these immense treasures? In my eyes this man is an equal of Picasso or Rembrandt and look how we honor his love for the arts and his memory and his gift to use ungrateful fu*ktards!
I must apologize to the memory of Sadequain saheb. Indeed, we were not worthy!