New approach to the low-res problem. Basically, we already have a 1024 minimum, and the tallest maps are restricting themselves to 2048 maximum. All backgrounds are scaled down 50%, then scaled up on draw. Saves memory, and backgrounds are already deliberately fuzzed for depth of field anyway.

file(GLOB images *.png)

install(FILES
    theme.cfg
    ${images}
    DESTINATION ${SHAREPATH}Data/Themes/Island)