<parameter type="constant" name="longAlpha" default="2" min="0" max="256" factor="256">
<name>α for moving average</name>
</parameter>
+ <parameter type="constant" name="lightOpacity" default="40" min="0" max="100" factor="100">
+ <name>Basic opacity for a light source. Added to sum in each frame.</name>
+ </parameter>
</effect>