Bilinearno filtriranje - glajenje tekstur, ko so le-te prikazane manjše ali večje kot v resnici. ampak ta način ima določene pomankljivosti. del terena, ki je oddaljen nekaj milj pred tabo bi imel drugače zelo grdo teksturo v primerjavi s tisto ki je prikazana za teren direktno pod tabo, to filtriranje pa tisto "grdo" reč izboljša s pomočjo izenačevanja barv večih pikslov in jo prikaže bolj okusno.
Citiram:
In this method the four nearest texels to the pixel center are sampled (at the closest mipmap level), and their colors are combined by weighted average according to distance. This removes the 'blockiness' seen during magnification, as there is now a smooth gradient of color change from one texel to the next, instead of an abrupt jump as the pixel center crosses the texel boundary. Bilinear filtering is almost invariably used with mipmapping; though it can be used without, it would suffer the same aliasing and shimmering problems as its nearest neighbor.
Trilinearno filtriranje - vsebuje elemente bilinearnega filtriranja plus "izboljšanje" prehoda, kjer je meja med dvema teksturama, ena prikazana na drugi stopnji mip-mappinga kot druga (recimo teren direktno pod tabo pa teren 10 NM pred tabo)
Citiram:
Trilinear filtering is a remedy to a common artifact seen in mipmapped bilinearly filtered images: an abrupt and very noticeable change in quality at boundaries where the renderer switches from one mipmap level to the next. Trilinear filtering solves this by doing a texture lookup and bilinear filtering on the two closest mipmap levels (one higher and one lower quality), and then linearly interpolating the results. This results in a smooth degradation of texture quality as distance from the viewer increases, rather than a series of sudden drops. Of course, closer than Level 0 there is only one mipmap level available, and the algorithm reverts to bilinear filtering.
Na kratko: trilinearno filtriranje je bolj napredno od bilinearnega ampak je tudi večji strojni davek na grafično kartico. če ti na performance ne vpliva potem je boljša izbira trilinearno filtriranje.
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