Your roughness 3D model looks blurry after manual unwrapping usually because of uneven UV island scaling, overlapping UVs, or texture resolution that’s too low for your model’s detail needs.
- Uneven scaling: Stretches the roughness texture on smaller UV areas, blurring details. - Overlapping UVs: Causes conflicting texture data, reducing clarity. - Low resolution: The texture can’t display fine roughness details when viewed closely.
Fix it by using UV packing tools to balance island sizes or slightly increasing texture resolution (e.g., from 1024x1024 to 2048x2048) if your workflow allows—this will sharpen the roughness effect.