Yup, and flexible.
Sand would form a rigid film that cracks, but with sawdust the whole thing
can be folded without permanent damage. You'd get fold marks, but they'll
disappear after a while... :)

Cheers!

Claudio

> Saw dust.... I was thinking about using sand, but sanddust would be MUCH
> lighter.
>
>
>> synthetic material; coat with PVA, scatter generous amounts of sawdust
>> on
>> it; let dry. Paint. Hey pronto, first class terrain mat! :)
>>