Decal Flow is an add-on for Blender that specializes in projecting mesh-based decal designs to other mesh surfaces. It can also generate meshes from images, giving you a way to add decals to your models entirely inside Blender without reaching for external software.
Decals are designed using Blender's edit mode tools, working in a grid-based structure using faces. The download includes a sample blend file for practising alongside the video tutorial. The add-on is built for concept artists sketching scenes and game artists who want to bake decals into a final low-poly mesh as textures.
The developer has planned future updates including projection on multiple separate meshes, projecting images using planes and grids, list UI enhancements and additional draw controls. Future updates are stated to be free of cost. Decal Flow is a Dev Fund contributor and works with the Cycles and Eevee render engines.