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I figured out a method to turn normal sprites into palettized sprites (sprites readable by the Palette Editor) a while ago, around the time Annie was announced. So now that I've got the process down, I'm opening submissions.

Here are some sample PSD files of sprites I've converted: Google Drive Folder
Step 4 requires a bit of coordination since all sprites of a single character would need matching color areas and matching color IDs. For existing characters, you can reference the Palette Editor (click on a sprite and you'll see the corresponding color ID as a circled number in the sidebar).
5.2.0 update: Apparently, official color IDs can change. So I guess it's not important to stay consistent with them in your submissions.
See my replies below for example submissions.

The Palette File Pipeline
- Choose a raw image (raw.png).
- Using the raw image, create the linework layer (line.png).
- Soft edges are allowed. If tracing, use the brush tool. If using selections, turn on anti-aliasing.
- The script only reads the alpha channel here; it does not use any color information.
- Using the raw image, create the base colors layer (base.png).
- Hard edges are required. Use the pencil tool instead of the brush. For other tools, turn off anti-aliasing and feathering.
- Using the base colors layer, create the color areas layer (area.png).
- Hard edges are required.
- Different items/materials/areas should be different colors.
- If colors match in this color map, they will match forever. (E.g. if the hat and the skin are both colored #A1B2C3 in your area.png submission, then the hat will always be skin-colored in the Palette Editor no matter what.)
- If you're picky about color IDs, encode them in the red channel. See this reply for more info.
- Submit the layers (raw.png, line.png, base.png, and area.png) in a reply to this post.
- I will input it into create_sprite.py and upload the result to the Palette Editor.
Here are some sample PSD files of sprites I've converted: Google Drive Folder
5.2.0 update: Apparently, official color IDs can change. So I guess it's not important to stay consistent with them in your submissions.
See my replies below for example submissions.
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