Nicky, Download the copy of Cloud_V6 from this link (http://forums.sketchucation.com/viewtopic.php?f=323&t=1537)and give it a try again. The version on Ruby Depot is different, or should I say it didn't work for me but this version did. I think I have figured out why I was having a problem with the DEM data I was creating from scratch. Once I have it all worked out I will post my findings. Basically I figured out that the X, Y and Z data seems to need to have a decimal point and a value after it. I was able to get it to work with the attached data file. Let me know if it works for you. JP Data to create test DEM

Thanks to both of you for your prompt responses. Let me give it a try. Worked like a champ. As is usually the case with SU I learn more everyday. JP

@johnpa said: I am one of those people that likes to understand why and how something works. That's exactly how one can really learn the program (and avoid running into seemingly not understandable issues)

At present i use the standard configuration in Sketchup i adjusted only the speed. Maybe if you use different 3D applications it could be necessary to create a configuration for a specific application which differs from the standard controls. Karlheinz