diff --git a/launcher/resources/backgrounds/rory-flat-bday.png b/launcher/resources/backgrounds/rory-flat-bday.png
index 700192256..73008fa22 100644
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diff --git a/launcher/resources/backgrounds/rory-flat-xmas.png b/launcher/resources/backgrounds/rory-flat-xmas.png
index 05e6687ca..ef64e5e5a 100644
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diff --git a/launcher/resources/backgrounds/rory-flat.png b/launcher/resources/backgrounds/rory-flat.png
index 4536dee78..d15aeb6fa 100644
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diff --git a/launcher/resources/backgrounds/teawie-bday.png b/launcher/resources/backgrounds/teawie-bday.png
index 7bf666ed4..6a2a75c11 100644
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diff --git a/launcher/resources/backgrounds/teawie-spooky.png b/launcher/resources/backgrounds/teawie-spooky.png
index 8b6bda630..9355064c0 100644
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diff --git a/launcher/resources/multimc/128x128/instances/enderpearl_legacy.png b/launcher/resources/multimc/128x128/instances/enderpearl_legacy.png
index 814709965..783255a50 100644
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diff --git a/launcher/resources/multimc/128x128/instances/herobrine_legacy.png b/launcher/resources/multimc/128x128/instances/herobrine_legacy.png
index bdbe009d9..d30309677 100644
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diff --git a/launcher/resources/multimc/16x16/bug.png b/launcher/resources/multimc/16x16/bug.png
index d7a253f23..9be77e3b7 100644
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diff --git a/launcher/resources/multimc/16x16/cat.png b/launcher/resources/multimc/16x16/cat.png
index 47c449549..fa8c20b69 100644
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diff --git a/launcher/resources/multimc/16x16/instance-settings.png b/launcher/resources/multimc/16x16/instance-settings.png
index 6875e8006..b042ec8cc 100644
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diff --git a/launcher/resources/multimc/16x16/log.png b/launcher/resources/multimc/16x16/log.png
index 429626d3a..3b94d73dd 100644
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diff --git a/launcher/resources/multimc/16x16/noaccount.png b/launcher/resources/multimc/16x16/noaccount.png
index 62388fc7e..83d4fe301 100644
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diff --git a/launcher/resources/multimc/16x16/refresh.png b/launcher/resources/multimc/16x16/refresh.png
index 0f6275f85..ea0b31d89 100644
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diff --git a/launcher/resources/multimc/16x16/settings.png b/launcher/resources/multimc/16x16/settings.png
index 6875e8006..b042ec8cc 100644
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diff --git a/launcher/resources/multimc/22x22/bug.png b/launcher/resources/multimc/22x22/bug.png
index 2219dcebb..80d586692 100644
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diff --git a/launcher/resources/multimc/22x22/cat.png b/launcher/resources/multimc/22x22/cat.png
index 4ad84846a..242fc1f0b 100644
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diff --git a/launcher/resources/multimc/22x22/copy.png b/launcher/resources/multimc/22x22/copy.png
index 74f2d45b7..4393ea098 100644
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diff --git a/launcher/resources/multimc/22x22/instance-settings.png b/launcher/resources/multimc/22x22/instance-settings.png
index cff081eda..74ba33e75 100644
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diff --git a/launcher/resources/multimc/22x22/new.png b/launcher/resources/multimc/22x22/new.png
index d132ec1fc..321bd58fe 100644
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diff --git a/launcher/resources/multimc/22x22/refresh.png b/launcher/resources/multimc/22x22/refresh.png
index bce4cc512..ac05ff7e3 100644
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index cff081eda..74ba33e75 100644
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index 8d5c2e752..8fac1c3bf 100644
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index 721c0998a..24c994e20 100644
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diff --git a/launcher/resources/multimc/24x24/log.png b/launcher/resources/multimc/24x24/log.png
index f6dc858d3..e45aa1577 100644
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diff --git a/launcher/resources/multimc/24x24/minecraft.png b/launcher/resources/multimc/24x24/minecraft.png
index 4bd9fefd3..b0eeb3a39 100644
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diff --git a/launcher/resources/multimc/24x24/resourcepacks.png b/launcher/resources/multimc/24x24/resourcepacks.png
index 4b7020b27..7942d80ad 100644
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diff --git a/launcher/resources/multimc/32x32/cat.png b/launcher/resources/multimc/32x32/cat.png
index d48f8a668..f8d3e30fe 100644
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diff --git a/launcher/resources/multimc/32x32/instance-settings.png b/launcher/resources/multimc/32x32/instance-settings.png
index 3447c5543..61277dd20 100644
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diff --git a/launcher/resources/multimc/32x32/instances/chicken_legacy.png b/launcher/resources/multimc/32x32/instances/chicken_legacy.png
index aa806bec4..08584bd38 100644
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diff --git a/launcher/resources/multimc/32x32/instances/ftb_logo_legacy.png b/launcher/resources/multimc/32x32/instances/ftb_logo_legacy.png
index fcd372756..e47b10de2 100644
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diff --git a/launcher/resources/multimc/32x32/instances/tnt_legacy.png b/launcher/resources/multimc/32x32/instances/tnt_legacy.png
index 644d6a0e7..976a89604 100644
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diff --git a/launcher/resources/multimc/32x32/log.png b/launcher/resources/multimc/32x32/log.png
index 4fc265f27..7e4d4db0b 100644
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diff --git a/launcher/resources/multimc/32x32/minecraft.png b/launcher/resources/multimc/32x32/minecraft.png
index f7c67158d..04defdc58 100644
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diff --git a/launcher/resources/multimc/32x32/refresh.png b/launcher/resources/multimc/32x32/refresh.png
index 960ba040c..5a8cc1c9f 100644
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diff --git a/launcher/resources/multimc/32x32/resourcepacks.png b/launcher/resources/multimc/32x32/resourcepacks.png
index 2a481b5f0..9ec1fa56e 100644
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diff --git a/launcher/resources/multimc/32x32/settings.png b/launcher/resources/multimc/32x32/settings.png
index 3447c5543..61277dd20 100644
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diff --git a/launcher/resources/multimc/32x32/star.png b/launcher/resources/multimc/32x32/star.png
index 6ea62a9e2..93bec63a9 100644
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diff --git a/launcher/resources/multimc/32x32/status-bad.png b/launcher/resources/multimc/32x32/status-bad.png
index d85c1d5df..df63c5cc2 100644
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diff --git a/launcher/resources/multimc/32x32/status-good.png b/launcher/resources/multimc/32x32/status-good.png
index 1927ce78d..a4fe21960 100644
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diff --git a/launcher/resources/multimc/32x32/status-yellow.png b/launcher/resources/multimc/32x32/status-yellow.png
index ad58f37c2..db9972df9 100644
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diff --git a/launcher/resources/multimc/32x32/viewfolder.png b/launcher/resources/multimc/32x32/viewfolder.png
index 25f2ccde6..6cf37bc46 100644
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diff --git a/launcher/resources/multimc/32x32/worlds.png b/launcher/resources/multimc/32x32/worlds.png
index c40ab653a..c2080eec3 100644
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diff --git a/launcher/resources/multimc/48x48/cat.png b/launcher/resources/multimc/48x48/cat.png
index 11d0919b9..eb4b68169 100644
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diff --git a/launcher/resources/multimc/48x48/checkupdate.png b/launcher/resources/multimc/48x48/checkupdate.png
index 60d379c11..4ff011967 100644
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diff --git a/launcher/resources/multimc/48x48/log.png b/launcher/resources/multimc/48x48/log.png
index 611b2ba89..c63802a10 100644
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diff --git a/launcher/resources/multimc/48x48/minecraft.png b/launcher/resources/multimc/48x48/minecraft.png
index 5be3fbb51..562e75636 100644
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diff --git a/launcher/resources/multimc/48x48/new.png b/launcher/resources/multimc/48x48/new.png
index 9241aaaed..e7a465ca3 100644
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diff --git a/launcher/resources/multimc/48x48/refresh.png b/launcher/resources/multimc/48x48/refresh.png
index fa05d324f..228392cb1 100644
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diff --git a/launcher/resources/multimc/48x48/star.png b/launcher/resources/multimc/48x48/star.png
index 31ba35683..d1f3389ae 100644
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diff --git a/launcher/resources/multimc/48x48/status-bad.png b/launcher/resources/multimc/48x48/status-bad.png
index f13c78a78..aae54577c 100644
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diff --git a/launcher/resources/multimc/48x48/status-good.png b/launcher/resources/multimc/48x48/status-good.png
index ce4060af2..5eca73d1b 100644
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diff --git a/launcher/resources/multimc/48x48/viewfolder.png b/launcher/resources/multimc/48x48/viewfolder.png
index 893f4caf2..e470c507d 100644
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diff --git a/launcher/resources/multimc/48x48/worlds.png b/launcher/resources/multimc/48x48/worlds.png
index d8b426ff3..bd62e6cb1 100644
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diff --git a/launcher/resources/multimc/50x50/instances/enderman_legacy.png b/launcher/resources/multimc/50x50/instances/enderman_legacy.png
index 3aca8b543..36c791eb0 100644
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diff --git a/launcher/resources/multimc/64x64/cat.png b/launcher/resources/multimc/64x64/cat.png
index c05276c87..6a578a39a 100644
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diff --git a/launcher/resources/multimc/64x64/checkupdate.png b/launcher/resources/multimc/64x64/checkupdate.png
index 337879a7c..aa1ffb6f7 100644
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diff --git a/launcher/resources/multimc/64x64/coremods.png b/launcher/resources/multimc/64x64/coremods.png
index db03752a0..79b0c5ca5 100644
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diff --git a/launcher/resources/multimc/64x64/log.png b/launcher/resources/multimc/64x64/log.png
index 5eb970d94..9d34ffacc 100644
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diff --git a/launcher/resources/multimc/64x64/new.png b/launcher/resources/multimc/64x64/new.png
index 987fd7098..1a269ada4 100644
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diff --git a/launcher/resources/multimc/64x64/refresh.png b/launcher/resources/multimc/64x64/refresh.png
index b253305a4..abb91e1b7 100644
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diff --git a/launcher/resources/multimc/64x64/resourcepacks.png b/launcher/resources/multimc/64x64/resourcepacks.png
index 80564d453..01faf5e80 100644
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diff --git a/launcher/resources/multimc/64x64/status-bad.png b/launcher/resources/multimc/64x64/status-bad.png
index 8701b542b..354cd95a1 100644
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diff --git a/launcher/resources/multimc/64x64/status-good.png b/launcher/resources/multimc/64x64/status-good.png
index ebd227103..696ca1566 100644
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diff --git a/launcher/resources/multimc/64x64/status-yellow.png b/launcher/resources/multimc/64x64/status-yellow.png
index 6c6c511f0..b18f7058c 100644
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diff --git a/launcher/resources/multimc/64x64/viewfolder.png b/launcher/resources/multimc/64x64/viewfolder.png
index 675ac0485..5772c2531 100644
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diff --git a/launcher/resources/multimc/64x64/worlds.png b/launcher/resources/multimc/64x64/worlds.png
index ffa854a69..22a03ac31 100644
Binary files a/launcher/resources/multimc/64x64/worlds.png and b/launcher/resources/multimc/64x64/worlds.png differ
diff --git a/launcher/resources/multimc/scalable/atlauncher-placeholder.png b/launcher/resources/multimc/scalable/atlauncher-placeholder.png
index f4314c434..8b6dedad5 100644
Binary files a/launcher/resources/multimc/scalable/atlauncher-placeholder.png and b/launcher/resources/multimc/scalable/atlauncher-placeholder.png differ
diff --git a/program_info/genicons.sh b/program_info/genicons.sh
index fe8d2e35e..cad811822 100755
--- a/program_info/genicons.sh
+++ b/program_info/genicons.sh
@@ -9,16 +9,7 @@ svg2png() {
     inkscape -w "$width" -h "$height" -o "$output_file" "$input_file"
 }
 
-sipsresize() {
-    input_file="$1"
-    output_file="$2"
-    width="$3"
-    height="$4"
-
-    sips -z "$width" "$height" "$input_file" --out "$output_file"
-}
-
-if command -v "inkscape" && command -v "icotool"; then
+if command -v "inkscape" && command -v "icotool" && command -v "oxipng"; then
     # Windows ICO
     d=$(mktemp -d)
 
@@ -30,6 +21,8 @@ if command -v "inkscape" && command -v "icotool"; then
     svg2png org.prismlauncher.PrismLauncher.svg "$d/prismlauncher_128.png" 128 128
     svg2png org.prismlauncher.PrismLauncher.svg "$d/prismlauncher_256.png" 256 256
 
+    oxipng --opt max --strip all --alpha --interlace 0 "$d/prismlauncher_"*".png"
+
     rm prismlauncher.ico && icotool -o prismlauncher.ico -c \
         "$d/prismlauncher_256.png"  \
         "$d/prismlauncher_128.png"  \
@@ -40,10 +33,10 @@ if command -v "inkscape" && command -v "icotool"; then
         "$d/prismlauncher_16.png"
 else
     echo "ERROR: Windows icons were NOT generated!" >&2
-    echo "ERROR: requires inkscape and icotool in PATH"
+    echo "ERROR: requires inkscape, icotool and oxipng in PATH"
 fi
 
-if command -v "inkscape" && command -v "sips" && command -v "iconutil"; then
+if command -v "inkscape" && command -v "iconutil" && command -v "oxipng"; then
     # macOS ICNS
     d=$(mktemp -d)
 
@@ -51,19 +44,22 @@ if command -v "inkscape" && command -v "sips" && command -v "iconutil"; then
 
     mkdir -p "$d"
 
+    svg2png org.prismlauncher.PrismLauncher.bigsur.svg "$d/icon_16x16.png" 16 16
+    svg2png org.prismlauncher.PrismLauncher.bigsur.svg "$d/icon_16x16@2.png" 32 32
+    svg2png org.prismlauncher.PrismLauncher.bigsur.svg "$d/icon_32x32.png" 32 32
+    svg2png org.prismlauncher.PrismLauncher.bigsur.svg "$d/icon_32x32@2.png" 64 64
+    svg2png org.prismlauncher.PrismLauncher.bigsur.svg "$d/icon_128x128.png" 128 128
+    svg2png org.prismlauncher.PrismLauncher.bigsur.svg "$d/icon_128x128@2.png" 256 256
+    svg2png org.prismlauncher.PrismLauncher.bigsur.svg "$d/icon_256x256.png" 256 256
+    svg2png org.prismlauncher.PrismLauncher.bigsur.svg "$d/icon_256x256@2.png" 512 512
     svg2png org.prismlauncher.PrismLauncher.bigsur.svg "$d/icon_512x512@2x.png" 1024 1024
-    sipsresize "$d/icon_512x512@2.png" "$d/icon_16x16.png" 16 16
-    sipsresize "$d/icon_512x512@2.png" "$d/icon_16x16@2.png" 32 32
-    sipsresize "$d/icon_512x512@2.png" "$d/icon_32x32.png" 32 32
-    sipsresize "$d/icon_512x512@2.png" "$d/icon_32x32@2.png" 64 64
-    sipsresize "$d/icon_512x512@2.png" "$d/icon_128x128.png" 128 128
-    sipsresize "$d/icon_512x512@2.png" "$d/icon_128x128@2.png" 256 256
-    sipsresize "$d/icon_512x512@2.png" "$d/icon_256x256.png" 256 256
-    sipsresize "$d/icon_512x512@2.png" "$d/icon_256x256@2.png" 512 512
+
+    oxipng --opt max --strip all --alpha --interlace 0 "$d/icon_"*".png"
+
     iconutil -c icns "$d"
 else
     echo "ERROR: macOS icons were NOT generated!" >&2
-    echo "ERROR: requires inkscape, sips and iconutil in PATH"
+    echo "ERROR: requires inkscape, iconutil and oxipng in PATH"
 fi
 
 # replace icon in themes
diff --git a/program_info/prismlauncher.ico b/program_info/prismlauncher.ico
index 86ceb838a..2f0fa67ff 100644
Binary files a/program_info/prismlauncher.ico and b/program_info/prismlauncher.ico differ
diff --git a/scripts/compress_images.sh b/scripts/compress_images.sh
new file mode 100755
index 000000000..1eef9f1c4
--- /dev/null
+++ b/scripts/compress_images.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+## If current working dirctory is ./scripts, ask to invoke from one directory up
+if [ ! -d "scripts" ]; then
+	echo "Please run this script from the root directory of the project"
+	exit 1
+fi
+
+find . -type f -name '*.png' -not -path '*/libraries/*' -exec oxipng --opt max --strip all --alpha --interlace 0 {} \;