Quote Originally Posted by Catfish View Post
I did run into another unfortunate problem on the new version of gimp. When saving a brush as .gbr (which the author recommends for houses), only the top layer of the brush will be saved. So it's probably a better choice just to save them as .gih, or save each individual building as separate brushes.
That is not new. .gbr is "gimp brush" and has always only supported single images. Greyscale images will create a gimp brush where the grey level equals brush transparency, and will paint in whatever the foregound colour is. RGBA images will paint exactly as they are created.

.gih is "gimp image hose" and is the format needed to create brushes containing multiple images that vary by direction, randomly, alternately, etc. The greyscale and RGBA are as per .gbr

-Rob A>