What is How do I paint a roughness 3D model without Photoshop?

To paint roughness on a 3D model without Photoshop, use specialized 3D texturing tools for direct surface painting—no 2D software needed. - **Substance Painter**: Industry-standard for 3D texturing, it has roughness-specific brushes and real-time lighting previews to see how paint affects surface texture (smooth vs. matte). - **Blender’s Texture Paint Mode**: Free and built-in to Blender, it lets you paint roughness directly on models—ideal for beginners since it’s included with the software. - **Krita**: Open-source and 3D-compatible, it offers intuitive tools for roughness maps and works with common 3D workflows. For newcomers, start with Blender or Krita—both have free tutorials to help you master roughness painting without Photoshop.