#!/bin/bash for zipfile in *.zip; do base=$(basename "$zipfile" .zip) mkdir "$base"_temp unzip -q "$zipfile" -d "$base"_temp cd "$base"_temp zip -q -X -0 -r "../$base.sb3" * cd .. rm -rf "$base"_temp done

Title: Beyond the Basics: How to Manually Edit and Re-Pack SB3 Files for High-Quality Projects

Always prefer SVGs over PNGs for "extra quality." They scale infinitely without pixelation.