Taking influence from Gloom: Cthulu, we decided to have transparent cards be a feature in our game.  Our team member Dan was able to very quickly take paper cut outs and laminate them. Playtests have gone well so far. I plan on doing some 3d work to see how many tiles we will need for the final version, as using the catan pieces works fine for now, but wont be able to let us to test for balance of movement as the game progresses with the limited amount of tiles.