Based off designs made for my kickstarter campaign, this is a mod for the Red Grass Games “Painter Lite” wet palette to turn it into a portable paint station. It makes use of the strap to hold a set of 6 brushes and has a cover that slides over the whole thing. Handy for when you want to carry your wet palette and a few brushes. As shown in the renders, you can slide the brush holder into the case cover slot and set up a paint station and hold the brushes vertically to save your ferrules. The part that covers the slot doubles as this position is a paint dish for metallic paints so you don't mess us up your palette.
If you don't have the "Painter Lite" palette, you can use this other model I made to fit:
https://makerworld.com/en/models/451797