.3mf is the only one supported for color IIRC. It “might” be buggy in the most recent releases You can paint it in Bambu studio OR with my Prusa’s I changed colors at different layers. Clunky but it works. This method works by making color groups by height. "If you wanted nights in tights to be RED make it a bit taller than the 2026 yellow (for example) change color the next layer after 2026. The advantage: MUCH less poops AND faster