Painting clouds on a ceiling

My little girl wants her bedroom to have a horse theme with the ceiling to have clouds painted on it.
The ceiling is slanted at one end and the whole ceiling is divided into sections with lattice strips. The strips are painted out with wood grain. So each section will have clouds painted inside them.

We first painted the ceiling a very light blue, which she chose. Then with a 2" chip brush and an off white I brushed and scrubbed in cloud formations, doing one section at a time. Make the clouds odd irregular shapes with uneven wispy edges. Space them out in a random order. Make sure they do not all look the same and are different sizes. Then using a white paint, chip in the high lights on the top edges of the clouds and tap in some areas in the middle of the clouds as well. Using a clean chip brush blend the area somewhat to soften. Then using a blue a couple shades darker than the base color, chip in areas on the under side of the cloud formations and again soften. At this point you can add a little of a grey blue color under the blue areas to give more depth. Stand back a look at the clouds. More white may need to be added where you put the white before to give it a more solid white look at the top of the clouds. You can also chip in some areas of white in between some of the clouds to give a hint of a wispy cloud here and there.