Chitrashala, or Ummed Mahal is a part of Garh Palace and it is probably in the best condition. Deservedly so, because it contains the famous painting room. All its walls and ceilings are covered in fabulous frescoes, illustrating court scenes or images out of Krishna's life in brilliant blue and green. They are in remarkably good state, but totally exposed, so I fear for their safety and protection.
The royal family still owns the fort and they open only a small part for public viewing. If you know in advance, you can arrange a visit to other parts, including Hathia Pol and the Bada Mahal (where rare Mongol/Asian paintings can be seen).