Been working this weekend on the largest map I've ever taken on with CC3, The Caves of Chaos, in preparation for running a D&D Next playtest. Here's how it's shaping up so far:
Using a lot of art from the CSUAC and SMAC collections. Some of the stuff will be hidden on the final map (like the pit) but I've really had a lot of fun with this map. I started off by taking the old-school blue map and dropping it at the bottom layer and scaling it to fit my grid. Then I built all the rooms, sometimes just drawing the floor then walls, other times (like the caves) using multipolys to make cut-out sections of the floor.
I'm still using standard effects on the sheets, once I get all the symbols stamped in I'll start tweaking with things like the transparency of the grid lines, shadow lengths and maybe some light sources. Note that I haven't settled on the floor and wall fills yet; with CC3 it's sooo easy to change them later.