Hi grekx, Here are some ideas from previous projects of ours. You may find more on our profile and add what you like to your ideabooks. We specialize in ceilings. It would help if you can post pictures of what your area looks like now. In the above picture, there were ducts to be covered, but the owner didn't want to lower the entire ceiling to cover them. Below, the same idea of using curvy shapes, but the duct to be covered was on a wall instead of a ceiling. The designer (Idevoks Design) used printed translucent stretch ceiling material and turned the problem into a gorgeous backlit design feature. Here, the shapes were kept more structured and rectilinear. Here, a drywall bulkhead around the perimeter of the room hides ducts and other equipment, while the printed stretch ceiling in the middle (tray ceiling) is the design feature.

different types of ceiling material are available in market like... gypsom plaster board AC sheets plywood bison wood GI sheets cellotax tiles fibre board etc......

what are the best material option for bathroom fake ceiling. best looking option

Yatin, Suspended drop ceilings are a good functional solution for a modern bathroom requirements.