▁that ▁are ▁ste ep ly ▁ang led ▁relative ▁to ▁the ▁camera . ▁ ▁To ▁solve ▁this ▁problem , ▁tr il ine ar ▁filtering ▁interpol ates ▁between ▁the ▁results ▁of ▁bil ine ar ▁filtering ▁on ▁the ▁two ▁m ip maps ▁nearest ▁to ▁the ▁detail ▁required ▁for ▁the ▁polygon ▁at ▁the ▁pixel . ▁If ▁the ▁pixel ▁would ▁take ▁up ▁ 1 / 1 0 0 ▁of ▁the ▁texture ▁in ▁one ▁direction , ▁tr il ine ar ▁filtering ▁would ▁interpol ate ▁between ▁the ▁result ▁of ▁filtering ▁the ▁ 1 2 8 × 1 2 8 ▁m ip map ▁as ▁y 1 ▁with ▁x 1 ▁as ▁ 1 2 8 , ▁and ▁the ▁result ▁of ▁filtering ▁on ▁the ▁ 6 4 × 6 4 ▁m ip map ▁as ▁y 2 ▁with ▁x 2 ▁as ▁ 6 4 , ▁and ▁then ▁interpol ate ▁to ▁. ▁ ▁The ▁first ▁step ▁in ▁this ▁process ▁is ▁of ▁course ▁to ▁determine ▁how ▁big ▁in ▁terms ▁of ▁the ▁texture ▁the ▁pixel ▁in ▁question ▁is . ▁ ▁There ▁are ▁a ▁few ▁ways ▁to ▁do ▁this , ▁and ▁the ▁ones ▁mentioned ▁here ▁are ▁not ▁necessarily ▁representative ▁of ▁all ▁of ▁them . ▁▁ ▁Use ▁the ▁distance ▁along ▁the ▁texture ▁between ▁the ▁current ▁pixel ▁and ▁the ▁pixel ▁to ▁its ▁right ▁( or ▁left , ▁or ▁above , ▁or ▁below ) ▁as ▁the ▁size ▁of ▁the ▁pixel . ▁ ▁Use ▁the ▁smallest ▁( or ▁biggest , ▁or ▁average ) ▁of ▁the ▁various ▁sizes ▁determined ▁by ▁using ▁the ▁above ▁method . ▁ ▁Det erm ine ▁the ▁u v -