I'd just layer 3-4 different iso tree symbols one in front of the other in Corel. Like so:


0 0 0 0
0 0 0 0
I I I I

(the I's are supposed to be tree trunks)

P.S. - if you're not selling it to anyone, of course you can make it for yourself. You could probably make yourself a massive stone version of monopoly and nobody would have anything against it. Is the game good?