Matplus is a paint layer system for Blender from BeFX Studios, built around real-time effects, 2D symmetry, and optimized texture baking. It draws inspiration from Substance Painter and ArmorPaint, but runs fully integrated into your Blender scene, so no external software is required.
The add-on is compatible with Blender versions 4.5 through 5.1 and works with the Cycles and Eevee render engines. It ships as a Blender extension add-on, and documentation is included to help you get going.
Released under a GPL license, Matplus appears in the superhive library, where it holds a 5-star rating across 28 ratings and over 2,000 sales. For anyone who wants a layer-based texturing and baking workflow without leaving Blender, it keeps the whole process inside the scene.