ok. this could be tidier, but, I'm sick of hogs w/ unmodified thaw thawing on exactly wrong turn.
file(GLOB FortSprites *L.png *R.png)
list(REMOVE_ITEM FortSprites *@2x.png)
list(REMOVE_ITEM FortSprites *-icon.png)
install(FILES
${FortSprites}
DESTINATION ${SHAREPATH}Data/Forts)