Which texture filtering method uses the closest texel with no interpolation?

Which texture filtering method uses the closest texel with no interpolation?

• A. Nearest uses the closest texel with no interpolation.
• B. Bilinear filters between four texels.
• C. Trilinear interpolates across mipmap levels.
• D. Anisotropic filtering improves quality at oblique angles.

Answer: (A)

Nearest-neighbor texture filtering samples the texel closest to the texture coordinate and uses that texel’s color with no interpolation. This makes the texture appear blocky or pixelated, but it’s the fastest option because it requires almost no computation beyond selecting a single texel. Bilinear filtering, in contrast, blends between the four nearest texels to produce smoother results. Trilinear filtering goes further by interpolating across mipmap levels to reduce aliasing when textures are seen at a distance. Anisotropic filtering improves detail when viewing textures at oblique angles by sampling more texels along the texture’s detail direction. So the method that uses the closest texel with no interpolation is nearest-neighbor filtering.

Nearest-neighbor texture filtering samples the texel closest to the texture coordinate and uses that texel’s color with no interpolation. This makes the texture appear blocky or pixelated, but it’s the fastest option because it requires almost no computation beyond selecting a single texel.

Bilinear filtering, in contrast, blends between the four nearest texels to produce smoother results. Trilinear filtering goes further by interpolating across mipmap levels to reduce aliasing when textures are seen at a distance. Anisotropic filtering improves detail when viewing textures at oblique angles by sampling more texels along the texture’s detail direction.

So the method that uses the closest texel with no interpolation is nearest-neighbor filtering.