I'm going to make my M12 as a vehicle that took part in the D-Day landings, thinking of posing it on a section of the inside of an LCT. Does anyone know what the floor and side wall of these things looked like?

Dave,

At there are a raft (pun intended) of LCT pics at the link below. The last 5 pics would probably be most useful. There are measured plans at the end of the list. The plans aren't very detailed but should be a good start.

HTH,
Shaun

http://www.ibiblio.org/hyperwar/USN/ships/img/LCT/

Thanks Keenan, the last couple are pretty useful.