How to initialise array of ubytes?

[Paul via Digitalmars-d-learn]

I'm trying to do this:

ubyte[MAPSIZE][MAPSIZE] map = 1;

but it doesn't work and I can't seem to cast the value to a ubyte 
(which looks rather ugly and out of place in D anyway). Is there 
a way to do this other than using a couple of loops?

Cheers

Paul