diff --git a/local/bin/luma-both-to-png b/local/bin/luma-both-to-png
index a6274f8..4db10db 100755
--- a/local/bin/luma-both-to-png
+++ b/local/bin/luma-both-to-png
@@ -1,3 +1,4 @@
 #!/bin/zsh
-date=${1%_*.bmp}
-magick ${date}_top.bmp ${date}_bot.bmp -alpha set -gravity Center -background 'rgba(0,0,0,0)' -append ${date}.png
+for date in ${(u)argv[@]%_*.bmp}; do
+	magick ${date}_top.bmp ${date}_bot.bmp -alpha set -gravity Center -background 'rgba(0,0,0,0)' -append ${date}.png || exit $?
+done
diff --git a/local/bin/luma-to-png b/local/bin/luma-to-png
index 6c4bbf0..ab96304 100755
--- a/local/bin/luma-to-png
+++ b/local/bin/luma-to-png
@@ -1,2 +1,6 @@
 #!/bin/zsh
-magick $1 -alpha set -fill 'rgba(0,0,0,0)' -draw 'color 0,0 point' $1:r.png
+for src in $argv; do
+	dest=$src:r.png
+	[[ $src = *.png ]] && dest=${src:r}_twitter.png
+	magick $src -alpha set -fill 'rgba(0,0,0,0)' -draw 'color 0,0 point' $dest || exit $?
+done