What are free tools for create roughness 3D models?

Free tools for creating roughness in 3D models include Blender (all-in-one modeling and material system), Krita (hand-painted details), and GIMP (texture editing). Blender lets you add roughness in one workflow using its node-based materials—no extra software needed. Krita is great for painting custom wear (like scratches or dirt) directly onto roughness maps. GIMP helps adjust existing textures or turn photos into usable roughness data. If you’re new, start with Blender’s basic tutorials—they simplify linking roughness textures to your model without complex setup.