I wend back to 8.3 cause 8.5 kept crashing on me
The best solution to lightwaves problems is to do a full reinstall. I know it can take some time but it usually fixes issues where plugins dont work or the interface is screwing up.
http://www.newtek.com/products/light...er2/index.html
Have a look at this. Dont know if it will help but its a lightwave tut on Skygen
Chris