diff --git a/default/alphas.txt b/default/alphas.txt
new file mode 100644
index 0000000..eecc6e6
--- /dev/null
+++ b/default/alphas.txt
@@ -0,0 +1,7 @@
+# Set water to 75% transparency
+default/default_river_water.png,75%
+default/default_river_water_flowing_animated.png,75%
+default/default_river_water_source_animated.png,75%
+default/default_water.png,75%
+default/default_water_flowing_animated.png,75%
+default/default_water_source_animated.png,75%
diff --git a/export.sh b/export.sh
index badea94..b739d1f 100755
--- a/export.sh
+++ b/export.sh
@@ -12,7 +12,7 @@ fi
 # converting .gif textures to the standard spritesheet format
 function folderExport() {
     echo "Exporting folder ${1}..."
-    rsync -r --exclude="*.gif" "${1}" "${EXPORT_DIR}"
+    rsync -r --exclude="*.gif" --exclude="*.txt" "${1}" "${EXPORT_DIR}"
 
     for i in `find "${1}" -name "*.gif" -print`; do
         mkdir -p "${EXPORT_DIR}/$(dirname "${i}")"
@@ -34,7 +34,6 @@ function copyExport() {
 # Paths from this file are relative to ${EXPORT_DIR}
 # Empty lines are also allowed
 function makeClones() {
-    # for i in `cat "${1}"`; do
     while read i; do
         if [[ -n ${i} && ${i::1} != '#' ]]; then
             dest="${EXPORT_DIR}/${i#*,}"
@@ -44,6 +43,22 @@ function makeClones() {
     done < ${1}
 }
 
+# Set texture alphas from a file
+#
+# Alpha file format:
+# relative/path/to/destination,alpha
+# #Comment
+#
+# Paths from this file are relative to ${EXPORT_DIR}
+# Empty lines are also allowed
+function makeAlphas() {
+    while read i; do
+        if [[ -n ${i} && ${i::1} != '#' ]]; then
+            mogrify -type TrueColorAlpha -alpha set -channel A -evaluate set ${i#*,} "${EXPORT_DIR}/${i%,*}"
+        fi
+    done < ${1}
+}
+
 # Ensure that the build directory exists
 mkdir -p "${EXPORT_DIR}"
 
@@ -75,6 +90,7 @@ folderExport "butterflies"
 folderExport "carts"
 folderExport "caverealms"
 folderExport "default"
+makeAlphas "default/alphas.txt"
 folderExport "doors"
 folderExport "dye"
 folderExport "email"
@@ -149,6 +165,7 @@ folderExport "repixture/player_skins"
 folderExport "repixture/ui"
 folderExport "repixture/village"
 folderExport "repixture/weather"
+makeAlphas "repixture/default/alphas.txt"
 makeClones "repixture-clones.txt"
 
 echo "Done! Files copied to ${EXPORT_DIR}"
diff --git a/repixture/default/alphas.txt b/repixture/default/alphas.txt
new file mode 100644
index 0000000..3bf8150
--- /dev/null
+++ b/repixture/default/alphas.txt
@@ -0,0 +1,3 @@
+# Set swamp water to 85% opacity
+default/default_swamp_water.png,85%
+repixture/default/default_swamp_water_animated.png,85%