stk-code_catmod/data/gfx/snow.xml

<?xml version="1.0"?>

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

    <spreading angle="3"           />
    
    <velocity  x="0.0"
               y="-0.01"
               z="0.0"             />
    
    <material  file="snowflake.png"/>
    
    <!-- Amount of particles emitted per second -->
    <rate      min="400"
               max="500"           />
    
    <!-- Minimal and maximal lifetime of a particle, in milliseconds. -->
    <lifetime  min="9000"
               max="9000"          />
    
    <!-- Size of the particles -->
    <size      min="0.40"
               max="0.60"          />
    
    <color     min="255 255 255"
               max="255 255 255"   />
    
    <!-- How much time in milliseconds before the particle is fully faded out  -->
    <fadeout   time="100"          />

</particles>