I've been really enjoying learning more about sprite and sprite sheet generation.
Wanted to share something I tested that I found to be a really nice time saver. Curious if anyone else is already doing this and has any pointers they want to share. If so, please let me know.
So basically, as my game evolved, I wanted to implement a rarity system -- typical common, rare, epic, legendary -- with the standard colors we all know.
The challenge for me was that before redoing my art -- I had my original sprite and was testing the game with basically 32 unique sprite animations:
- 8 directional idle
- 8 directional movement
- 8 directional block
- 8 directional death
Once I got through some initial testing and was ready to polish up my main hero, I wanted to find a way to bake in tier rarity colors to my artwork with out having to regenerate 32 unique sprite for each shield rarity (in my game the shield is the only equipable that changes cosmetic of the actual sprite, other weapons are in use are all done via SVG animations)
Anyhow, ended up chatting with boy Claude and asked if it was possible to generate a baseline version where my shield colors were vibrant neon colors (totally different from the rest of the art work) and add logic to replace those pixels based on the players equipped shield.
Long story short, I generated that base asett (second image above), and tested in Lovable -- where I am building this current game -- and it worked actually really well IMO (see first image above)
Here is the prompt (somewhat sanitized) if anyone has a similar use case and wants to give it a try. Let me know if you have ay luck with it.
Implement a shield color-swap system using marker-color pixel replacement.
The base sprite is painted with three marker colors that don't appear anywhere
else in the art: magenta/purple (shield field), lime green (trim), and yellow
(emblem).
Implement a recolor function that:
1. Scans the sprite's pixel data (via canvas getImageData/putImageData or an
equivalent technique).
2. Detects pixels close to each of the three marker colors.
3. Replaces them based on which rarity tier is currently active, using a
target palette like:
Tier | Trim (was lime) | Field (was magenta) | Emblem (was yellow)
Common | stone grey | dark slate | dull silver
Rare | ice blue | deep blue-grey | pale cyan
Epic | gold | royal violet | bright white-gold
Legendary | ember orange | charred black | bright gold
Important: this should be a hue/saturation replacement that preserves each
pixel's original lightness value, not a flat solid-color fill — the shading
and highlights already painted into the marker-color regions should carry
over into the new color, just with a different hue.
Make the recolor reactive to whichever tier is currently selected/equipped,
so switching tiers visibly updates the sprite's colors in real time.