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png/README.md

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+# Cave-Story-Lethrys-Upscale
+A built-from-scratch, 2xRes upscale of Cave Story, intended for community use.
+
+![Screenshot](screenshot.png)
+
+Features of this upscale:
+
+- Base game is 100% complete, from Start Point to end credits, as well as a few (but not all) unused sprites
+- Remains faithful to the original art style
+- (Hopefully) free of asymmetrical sprites, leftover 1xRes pixels, and other weird inconsistencies seen in the Nicalis upscale
+- Compatible with Freeware, CSE2, and Cave Story+
+- Made for open community use
+
+Instructions for enabling 2xRes:
+
+Freeware:
+
+Install Clownacy's .DLL mod loader and set sprite_resolution to '2' in /mods/graphics_enhancement/settings.ini
+
+That, or use the Doukutsu2x executable if you somehow have it.
+
+CSE2:
+
+Step 1: Wait for Nicalis to allow CSE2 to exist again
+
+After you have done that: In src/CommonDefines.h, set SPRITE_SCALE to '2', and compile using the instructions in the readme. This define only exists on enhanced branches.
+
+Cave Story+:
+
+Cave Story+ by default supports 2xRes and should be able to load these spritesheets. Just insert them.

png/convert_bmp_to_png.sh

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+#!/bin/bash
+# converts bmp to png in data/
+for i in $(find data/ -type f -print | grep -i .bmp)
+do
+    echo $i
+    mogrify -format png -transparent Black $i
+    rm $i
+done