A 3D model’s shader appears blurry typically from low texture resolution, flawed UV mapping, or incorrect shader settings (like over-soft filtering).
Low-resolution textures lack detail for close views, causing pixelation; poor UV mapping stretches or distorts textures across the model’s surface; excessive bilinear filtering can unnecessarily soften edges.
In tools like Blender or Unity, try increasing texture resolution first, fix UV stretching with unwrapping tools, or switch shader filtering to “anisotropic” for sharper angled surfaces.