Neat, Rayraz!

Hmm... floodfill the grey bits to white (would need several attempts with a very low tolerence), convert to grey-scale, tweak contrast/tone-balance, and apply to terrain..:-)) Instant footprint, lit any way you wanted it...

(I've just realised that this is the 1st ever thread I've started that has run to more than 1 page -- I think...)

Cheers,
Diolma

(Who is still hangin'...)