stk-code_catmod/data/gfx/smoke.xml

<?xml version="1.0"?>
<particles emitter="point">

    <spreading angle="90"        />
    
    <velocity  x="0.003"
               y="0.003"
               z="0.003"         />
    
    <material  file="smoke.png"  />
    
    <!-- Amount of particles emitted per second -->
    <rate      min="100"
               max="250"         />
    
    <!-- Minimal and maximal lifetime of a particle, in milliseconds. -->
    <lifetime  min="300"
               max="500"         />
    
    <!-- Size of the particles -->
    <size      min="0.2"
               max="0.66"        />

    <color     min="255 255 255"
               max="255 255 255" />

    <!-- How much time in milliseconds before the particle is fully faded out  -->
    <fadeout   time="500"        />

</particles>