if shouldGenerate "$FORCE_BLOWN""$WHITE_IMAGE""overlay";then
gm convert "$CONV"-black-threshold$BLOWN_WHITE_BT-white-threshold$BLOWN_WHITE_WT-negate-fill\#$OVERLAY_WHITE-opaque black -colors 2 -matte-transparent white "$WHITE_IMAGE"
gm convert "$GM_INTERMEDIATE"-black-threshold$BLOWN_WHITE_BT-white-threshold$BLOWN_WHITE_WT-negate-fill\#$OVERLAY_WHITE-opaque black -colors 2 -matte-transparent white "$WHITE_IMAGE"
fi
if shouldGenerate "$FORCE_BLOWN""$BLACK_IMAGE""overlay";then
gm convert "$CONV"-black-threshold$BLOWN_BLACK_BT-white-threshold$BLOWN_BLACK_WT-fill\#$OVERLAY_BLACK-opaque black -colors 2 -matte-transparent white "$BLACK_IMAGE"
gm convert "$GM_INTERMEDIATE"-black-threshold$BLOWN_BLACK_BT-white-threshold$BLOWN_BLACK_WT-fill\#$OVERLAY_BLACK-opaque black -colors 2 -matte-transparent white "$BLACK_IMAGE"