Hi Lauri,
If the eyes blink fully closed then you should be able to add a simulated sleeping effect by simply holding down the left mouse button while recording puppeteering.
To do this open the Puppeteering Window (CTRL+P), Clear the current selection, and then select both upper and lower eyelids. Now when you record, just hold the left mouse button down.
Hope this helps.
Peter
Forum Administrator
www.reallusion.com