stk-code_catmod/data/models/materials.xml

<?xml version="1.0"?>
<materials>
  <material name="banana.png"/>
  <material name="gift-box.png"/>
  <material name="gift-loop.png"  shader="spheremap"/>
  <material name="gold.png"  light="Y" shader="spheremap"/>
  <material name="silver.png"  light="Y" shader="spheremap"/>
  <material name="bronze.png"  light="Y" shader="spheremap"/>

  <material name="stk_mod_nitroBarrel.png" /> 
  <material name="stk_mod_nitroBottle.png" />
  <material name="stk_mod_nitroLogo.png" shader="additive" disable-z-write="Y" />

  <material name="traffic_light_green.jpg" shader="unlit"/>
  <material name="traffic_light_yellow.jpg" shader="unlit"/>
  <material name="traffic_light_red.jpg" shader="unlit"/>
  
  <material name="bubblegum_shield.png" shader="alphablend" disable-z-write="Y"/>
  <material name="bubblegum_shield_nolok.png" shader="alphablend" disable-z-write="Y"/>
  <material name="parachute.png" backface-culling="n" ignore="Y"/>
  <material name="zipper.png" shader="unlit" zipper="Y"/>
</materials>