When texturing 3D models for a PBR workflow, you control roughness by connecting shader nodes (e.g., image texture, noise, or ramp nodes) to the material’s roughness input—this directly adjusts how matte or glossy the surface appears.
- **Replicate real details**: Use a painted roughness map for worn wood (higher roughness in scuffed areas) or a noise node for metal scratches—these nodes mimic real-world wear. - **Avoid flatness easily**: For beginners, start with a base roughness map and layer a subtle noise node—this adds natural variation without complex setup.
This method keeps your materials realistic and adjustments flexible, aligning with PBR’s physical accuracy.