Round Liner (RL): Cov kab sib hloov kab yograu sab hauv thiab piav qhia cov qauv tsim. Cov no yog cov koob txhaj tshuaj nruj nreem, koom ua ib kab ncig. Hloov Shader (RS): Hloov cov koob txhaj tshuaj yog rau qhov ntxoov ntxoo. Cov no yog cov ntsiab lus koob tau teeb tsa hauv daim ntawv ncig, tab sis tsis yog nruj nreem ua pawg raws li cov kab puag ncig.
A' puag ncig' rab koob uas tau muab kaw nruj nreem rau hauv lub ntsej muag tuaj yeem tuav taukaum tsib koob. Qhov no yog siv los qhia txog kev tattoo. Kev siv ntau txog kaum tsib rab koob yuav siv rau xim thiab ntxoov ntxoo.
