Volumetric clouds - VDB (Sample / noise)

[igordesign]

Hi friends, i´m trying to fix this samples/noise on the shadow areas, but i don´t get a good settings, anyone can help me?
I´m using sun / sky for lighting and this vdbs are from houdini.
i Tryed to increase the steps but don´t affect the result.
Thanks!

[dgruwier]

Try reducing the "light cache speed up", or disable it entirely. It'll slow things down, but I've found that usually that's what causes that kind of splotchyness.