What factors affect realism when choosing surface roughness values?

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What factors affect realism when choosing surface roughness values?

Asked on Dec 17, 2025

Answer

Surface roughness values significantly impact the realism of a 3D model by influencing how light interacts with the surface, affecting reflections and material appearance. Understanding the relationship between roughness and material type is crucial for achieving believable textures and finishes.

Example Concept: Surface roughness determines the spread and intensity of reflections on a material. Low roughness values create sharp, clear reflections typical of polished surfaces like glass or metal, while high roughness values produce diffuse, blurred reflections seen in materials like concrete or fabric. Adjusting these values based on real-world material characteristics enhances the visual authenticity of 3D models.

Additional Comment:

Consider the material's real-world counterpart when setting roughness values.
Use reference images to guide roughness adjustments for accuracy.
Test different lighting scenarios to ensure consistent realism across environments.

✅ Answered with 3D Design best practices.

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