Nick,

Look on http://www.virtualsoaring.org/goto.html where you will find a link
to 'Cross Country Soaring'
This program will enable you to add thermal and ridge lift to the MSTS
scenery.

If doing this yourself seems daunting, there are some ready-made files under
the 'Scenery' area.

John
Circling in sink - A triumph of hope over experience

"Nick" wrote in message
...
Do any sims such as MS 2004 simulate thermal activity?

TIA