stk-code_catmod/data/gfx/gfx_sparkBlue_a.xml

<?xml version="1.0"?>

<!-- For sky particles, the size of the box is ignored -->
<particles emitter="sphere" radius="0.2">

    <spreading angle="10"           />
    
    <velocity  x="-0.000"
               y="0.003"
               z="-0.000"             />
    
    <material  file="gfx_sparkBlue_a.png" clampu="Y" clampv="Y" />
    
    <!-- Amount of particles emitted per second -->
    <rate      min="20"
               max="50"           />
    
    <!-- Minimal and maximal lifetime of a particle, in milliseconds. -->
    <lifetime  min="1000"
               max="1500"          />    

    <!-- Size of the particles -->
    <size min="0.08"
         max="0.15"
         x-increase-factor="1.2"
         y-increase-factor="1.3" /> 
    
    <color     min="40 40 255"
               max="255 255 255"   />

</particles>