Why $isit$ critical $we$ perform clipping for shapes that intersect the near plane? What space should $we$ perform this clipping $in?$

How does $aUV$ coordinate become a Color from a texture's surface? $To$ the best $of$ your ability, explain the process $of$ how that color gets $on$ screen and stays relative $to$ a triangle.

Most modern GPUs can utilize Anisotropic filters without too much issue. This was not always the case. How does such a filter differ from simpler filters such $as$ Tri$-$Linear and $Bi-$Linear filters that makes $itso$ comparatively expensive?