進階洞穴核心組合（未塗裝）

The Convex Corners finally let me build the winding passages I couldn't pull off with basic sets. Every piece clicks together solidly, even the oddly shaped Swell Walls. My cave layout looks truly organic now.

I was a bit worried the unpainted look would feel flat, but the twisted shapes and those convex corners really cast their own shadows and make the whole cavern feel alive. My players actually paused to admire the terrain before we even started the session.

The new wall shapes are a nice change from the basic cavern sets, but some of the pieces don't fit together as tightly as I'd hoped. The twisted look adds more variety to builds, though I wish the connection points were a bit more consistent.