Volumetric Shadow

I followed the Tutorial at:
for volumetric lighting, everything works fine, but since I got blender 2.4 instead of 2.37 which this despcription ist made for, I can’t find the “Halo step” slider, to enable volumetric shadow as well.

Anyone got a clue?

It is still there in the Lamp options. Not a slider anymore though. Just a numeric input value.

Look for it under the “Sahdow & Spot” options. Bottom right of that tab.


I found it, but I additionally had to enable Buffered Shadows to see the button. I always thought, that buffered shadows are a time-saving reduction of realism. Is it actually the other way round?