<svg width="900" height="900" >
<defs>
<filter id="mohu">
<feGaussianBlur stdDeviation="3"/>
</filter>
<filter id="f1" x="0" y="0" width="200%" height="200%">
<feOffset result="offOut" in="SourceGraphic" dx="20" dy="20" />
<feGaussianBlur result="blurOut" in="offOut" stdDeviation="10" />
<feBlend in="SourceGraphic" in2="blurOut" mode="normal" />
</filter>
</defs>s
<circle cx="100" cy="100" r="50" fill="gold"
filter="url(#f1)"/>
</svg>